Difference: Approved2008CosmicPlotsJetEtMiss (1 vs. 40)

Revision 402010-12-06 - ElmarRitsch

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Preliminary Results from Highly Energetic Cosmic Rays in the ATLAS Calorimeter

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 The aim of the results is to demonstrate our understandings of the measured energy spectra from the cosmic runs and to investigate the performance of the cleaning cuts against cosmic rays.
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Cosmic data triggered by L1Calo were used for the studies. L1Calo triggers when there are large energy
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Cosmic data triggered by L1Calo were used for the studies. L1Calo triggers when there are large energy
 deposits in the calorimeter towers. Here, we used a specific run (90272) from September 2008. The data used in the analyses have been reprocessed in December 2008.

Cosmic ray Monte Carlo samples were produced using the known cosmic muon flux at the ground level (A. Dar , Phys. Rev. Letters 51, 227 (1983) is used as the reference). Only single muons are considered in the Monte Carlo simulation (no air showers). The samples were produced in

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4 slices considering the original muon momentum generated at the ground level (10-100 GeV, 100-300 GeV, 300 GeV-1 TeV, 1-5 TeV). These samples were later normalized according to the flux.
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4 slices considering the original muon momentum generated at the ground level (10-100 GeV, 100-300 GeV, 300 GeV-1 TeV, 1-5 TeV). These samples were later normalized according to the flux.
 The simulation takes into account the muon interactions through the rock and the ATLAS detector. The triggers were not considered in the simulation.
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  [SumET]
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Distribution of the scalar sum of the transverse energy in all cells measured in the calorimeter (Sum ET) from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo simulation. The MET_Base algorithm (i.e. all cells with |E|>2 sigma are considered for the calculation) is used for the Sum ET calculation. Energy is at the electromagnetic scale. Monte Carlo distribution is normalized to data in the 100-300 GeV range. Only events which have a jet with ET>20 GeV are included. Trigger effects are not considered in the simulation. The measured Sum ET distribution is well described by the simulation. At high ET, more events are found in the data than in the MC. This might be explained by the limited MC statistics and by air shower events not included in the simulation.
SumEt_Base_j20.png
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Distribution of the scalar sum of the transverse energy in all cells measured in the calorimeter (Sum ET) from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo simulation. The MET_Base algorithm (i.e. all cells with |E|>2 sigma are considered for the calculation) is used for the Sum ET calculation. Energy is at the electromagnetic scale. Monte Carlo distribution is normalized to data in the 100-300 GeV range. Only events which have a jet with ET>20 GeV are included. Trigger effects are not considered in the simulation. The measured Sum ET distribution is well described by the simulation. At high ET, more events are found in the data than in the MC. This might be explained by the limited MC statistics and by air shower events not included in the simulation.
SumEt_Base_j20.png
 

[Jet Transverse Energy]

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Distribution of jet transverse energy from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. The same normalization factor as for the figure above is applied. The ATLAS Cone Jet algorithm with a cone size 0.4 is used. Calorimeter clusters reconstructed with the topological clustering algorithm are the inputs for the jet reconstruction. Only jets with ET>20 GeV are shown. The jet energy is at the electromagnetic scale. The shape of the distribution is well described by the simulation. At high ET, more events are found in the data than in the MC. This might be explained by the limited MC statistics and by air shower events not included in the simulation.
JetEt_TopoR4.png
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Distribution of jet transverse energy from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. The same normalization factor as for the figure above is applied. The ATLAS Cone Jet algorithm with a cone size 0.4 is used. Calorimeter clusters reconstructed with the topological clustering algorithm are the inputs for the jet reconstruction. Only jets with ET>20 GeV are shown. The jet energy is at the electromagnetic scale. The shape of the distribution is well described by the simulation. At high ET, more events are found in the data than in the MC. This might be explained by the limited MC statistics and by air shower events not included in the simulation.
JetEt_TopoR4.png
 

[Jet EM Fraction]

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The jet EM fraction is the ratio of the energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. The jet EM fraction from the cosmic L1Calo data stream (run 90272 in Sep. 2008), a cosmic Monte Carlo simulation, and QCD di-jet Monte Carlo samples simulating proton-proton collisions are shown. Only jets with ET>20 GeV are included. The distributions were normalized by the total number of jets (areas are 1). The most likely value for the EM fraction is 0 or 1 for fake jets from cosmics, since the high energy deposit from photons originated from high energetic muons will localize either in the EM or the hadronic calorimeter. The QCD jets have a broad distribution of EM fraction peaking around 0.8. EM fractions less than 0 or larger 1, are due to small negative energy contribution coming from noise. Good separation between real QCD jets and fake jets from cosmics is observed. Selection cuts around 0 and 1 can remove most of the fake jets while keeping most of the jets produced in proton-proton collisions.
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The jet EM fraction is the ratio of the energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. The jet EM fraction from the cosmic L1Calo data stream (run 90272 in Sep. 2008), a cosmic Monte Carlo simulation, and QCD di-jet Monte Carlo samples simulating proton-proton collisions are shown. Only jets with ET>20 GeV are included. The distributions were normalized by the total number of jets (areas are 1). The most likely value for the EM fraction is 0 or 1 for fake jets from cosmics, since the high energy deposit from photons originated from high energetic muons will localize either in the EM or the hadronic calorimeter. The QCD jets have a broad distribution of EM fraction peaking around 0.8. EM fractions less than 0 or larger 1, are due to small negative energy contribution coming from noise. Good separation between real QCD jets and fake jets from cosmics is observed. Selection cuts around 0 and 1 can remove most of the fake jets while keeping most of the jets produced in proton-proton collisions.
 

JetEMF_TopoR4.png

[Number of Calorimeter Clusters]

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The number of calorimeter clusters in jets from cosmic L1Calo data stream (run 90272 in Sep. 2008), a cosmic Monte Carlo simulation, and QCD di-jet Monte Carlo samples simulating proton-proton collisions. Only jets with ET>20 GeV and |eta| < 3.2 are shown, since the number of clusters do not have much fake rejection power in the forward region due to large granularity. Fake jets tend to have small numbers of clusters. By requiring low cluster multiplicity, most of the fake jets can be removed while keeping most of the jets produced in proton-proton collisions.
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The number of calorimeter clusters in jets from cosmic L1Calo data stream (run 90272 in Sep. 2008), a cosmic Monte Carlo simulation, and QCD di-jet Monte Carlo samples simulating proton-proton collisions. Only jets with ET>20 GeV and |eta| < 3.2 are shown, since the number of clusters do not have much fake rejection power in the forward region due to large granularity. Fake jets tend to have small numbers of clusters. By requiring low cluster multiplicity, most of the fake jets can be removed while keeping most of the jets produced in proton-proton collisions.
 

JetSize_TopoR4.png

[Jet Transverse Energy Distrubution after Cleaning Cuts]

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The distribution of the jet transverse energy from cosmic L1Calo data stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only jets with ET>20 GeV are included in the figure. The blue points are from data, and the red solid lines are from the Monte Carlo. The blue square marks and the red solid distributions are before jet cleaning cuts. The blue open circles and the red dotted lines show distributions after applying a cut on the EM fraction (jets remaining after 0.2 < EM fraction <0.97 is required). The blue triangular marker and the red dash lines show distributions after applying the cut on the EM fraction (0.2 < EM fraction <0.97) and the number of clusters (jets remain when number of clusters >=7). The cuts are used as an illustration of the possible performance of the cleaning cuts.
JetEt_TopoR4_Cleaning.png
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The distribution of the jet transverse energy from cosmic L1Calo data stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only jets with ET>20 GeV are included in the figure. The blue points are from data, and the red solid lines are from the Monte Carlo. The blue square marks and the red solid distributions are before jet cleaning cuts. The blue open circles and the red dotted lines show distributions after applying a cut on the EM fraction (jets remaining after 0.2 < EM fraction <0.97 is required). The blue triangular marker and the red dash lines show distributions after applying the cut on the EM fraction (0.2 < EM fraction <0.97) and the number of clusters (jets remain when number of clusters >=7). The cuts are used as an illustration of the possible performance of the cleaning cuts.
JetEt_TopoR4_Cleaning.png
 
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  [Event EM Fraction]
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The Event EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), a cosmic Monte Carlo simulation, and QCD di-jet Monte Carlo samples simulating proton-proton collisions. The Event EM fraction is defined for each event as a jet ET weighted-average of the jet EM fraction. Jets with ET>20 GeV are considered. Good separation between real QCD jets and fake jets from cosmics were observed. Event EM fraction is a promising observable to remove events with fake missing ET.
EvEMF_TopoR4_j20.png
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The Event EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), a cosmic Monte Carlo simulation, and QCD di-jet Monte Carlo samples simulating proton-proton collisions. The Event EM fraction is defined for each event as a jet ET weighted-average of the jet EM fraction. Jets with ET>20 GeV are considered. Good separation between real QCD jets and fake jets from cosmics were observed. Event EM fraction is a promising observable to remove events with fake missing ET.
EvEMF_TopoR4_j20.png
 
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  [Event Display from a Single Muon Event]
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Event display of an event with a single cosmic muon passing through the detector and depositing more than 1 TeV in Tile Calorimeter cells. The green lines show the muon segments. The muon segments in X-Y view are pointing to the interaction point, due to the lack of RPC hits. The yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the gray marker. The light blue dotted line is the direction of Missing ET. The highlights in the MDT indicate hits (yellow for any hits, and orange when tracks are reconstructed). No track was reconstructed in the inner detector for this event. The X-Y projection and the R-Z projection are shown.

SingleMuon_90272_2006956_XY.pngSingleMuon_90272_2006956_rZ.png
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Event display of an event with a single cosmic muon passing through the detector and depositing more than 1 TeV in Tile Calorimeter cells. The green lines show the muon segments. The muon segments in X-Y view are pointing to the interaction point, due to the lack of RPC hits. The yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the gray marker. The light blue dotted line is the direction of Missing ET. The highlights in the MDT indicate hits (yellow for any hits, and orange when tracks are reconstructed). No track was reconstructed in the inner detector for this event. The X-Y projection and the R-Z projection are shown.

SingleMuon_90272_2006956_XY.pngSingleMuon_90272_2006956_rZ.png
 

Revision 392010-05-10 - PatrickJussel

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Preliminary Results from Highly Energetic Cosmic Rays in the ATLAS Calorimeter

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Revision 382010-03-05 - RichardTeuscher

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META TOPICMOVED by="DaveCharlton" date="1240238078" from="Atlas.ApprovedCosmicPlotsJetEtmiss" to="Atlas.ApprovedCosmicPlotsJetEtMiss"
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META TOPICMOVED by="teuscher" date="1267820315" from="Atlas.ApprovedCosmicPlotsJetEtMiss" to="Atlas.Approved2008CosmicPlotsJetEtMiss"

Revision 372009-12-04 - TancrediCarli

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Revision 362009-11-24 - PatrickJussel

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Preliminary Results from Highly Energetic Cosmic Rays in the ATLAS Calorimeter

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Revision 352009-10-12 - RichardTeuscher

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Preliminary Results from Highly Energetic Cosmic Rays in the ATLAS Calorimeter

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Jets/Missing Et from Cosmic Runs

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Contacts for these plots: Tancredi Carli, Jimmy Proudfoot
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Contacts for these plots: Tancredi Carli, Richard Teuscher
 

Revision 342009-04-20 - HidekiOkawa

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Preliminary Results from Highly Energetic Cosmic Rays in the ATLAS Calorimeter

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  [Event Display from a Single Muon Event]
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Event display of an event with a single cosmic muon passing through the detector and depositing more than 1 TeV in Tile Calorimeter cells. The green lines show the muon segments. The muon segments in X-Y view are pointing to the interaction point, due to the lack of RPC hits. The yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the gray marker. The light blue dotted line is the direction of Missing ET. The highlights in the MDT indicate hits (yellow for any hits, and orange when tracks are reconstructed). No track was reconstructed in the inner detector for this event. The X-Y projection and the R-Z projection are shown.

SingleMuon_90272_2006956_xy.pngSingleMuon_90272_2006956_rz.png
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Event display of an event with a single cosmic muon passing through the detector and depositing more than 1 TeV in Tile Calorimeter cells. The green lines show the muon segments. The muon segments in X-Y view are pointing to the interaction point, due to the lack of RPC hits. The yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the gray marker. The light blue dotted line is the direction of Missing ET. The highlights in the MDT indicate hits (yellow for any hits, and orange when tracks are reconstructed). No track was reconstructed in the inner detector for this event. The X-Y projection and the R-Z projection are shown.

SingleMuon_90272_2006956_XY.pngSingleMuon_90272_2006956_rZ.png
 
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  [Event Display from an Air Shower Event]
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Event display of an air shower event. The green lines show the muon segments. The yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the gray marker. The light blue dotted line is the direction of Missing ET. The yellow highlights in the MDT indicate hits. The X-Y projection and the R-Z projection are shown.

AirShower_90272_4227806_xy.pngAirShower_90272_4227806_rz.png
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Event display of an air shower event. The green lines show the muon segments. The yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the gray marker. The light blue dotted line is the direction of Missing ET. The yellow highlights in the MDT indicate hits. The X-Y projection and the R-Z projection are shown.

AirShower_90272_4227806_XY.pngAirShower_90272_4227806_rZ.png
 
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META FILEATTACHMENT attachment="SingleMuon_90272_214077_rZ.eps" attr="" comment="" date="1240250562" name="SingleMuon_90272_214077_rZ.eps" path="SingleMuon_90272_214077_rZ.eps" size="682803" stream="SingleMuon_90272_214077_rZ.eps" user="Main.HidekiOkawa" version="1"
META FILEATTACHMENT attachment="AirShower_90272_4227806_rZ.eps" attr="" comment="" date="1240252613" name="AirShower_90272_4227806_rZ.eps" path="AirShower_90272_4227806_rZ.eps" size="3745273" stream="AirShower_90272_4227806_rZ.eps" user="Main.HidekiOkawa" version="1"
META FILEATTACHMENT attachment="AirShower_90272_4227806_XY.eps" attr="" comment="" date="1240252635" name="AirShower_90272_4227806_XY.eps" path="AirShower_90272_4227806_XY.eps" size="5509004" stream="AirShower_90272_4227806_XY.eps" user="Main.HidekiOkawa" version="1"
 
META TOPICMOVED by="DaveCharlton" date="1240238078" from="Atlas.ApprovedCosmicPlotsJetEtmiss" to="Atlas.ApprovedCosmicPlotsJetEtMiss"

Revision 332009-04-20 - DaveCharlton

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META TOPICPARENT name="AtlasResults"
Added:
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>
 

Preliminary Results from Highly Energetic Cosmic Rays in the ATLAS Calorimeter

<!--optional-->
Line: 24 to 25
 

Jets/Missing Et from Cosmic Runs

Added:
>
>
Contacts for these plots: Tancredi Carli, Jimmy Proudfoot
 
Line: 32 to 34
  [SumET]
Changed:
<
<
Distribution of the scalar sum of the transverse energy in all cells measured in the calorimeter (Sum ET) from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo simulation. The MET_Base algorithm (i.e. all cells with |E|>2 sigma are considered for the calculation) is used for the Sum ET calculation. Energy is at the electromagnetic scale. Monte Carlo distribution is normalized to data in the 100-300 GeV range. Only events which have a jet with ET>20 GeV are included. Trigger effects are not considered in the simulation. The measured Sum ET distribution is well described by the simulation. At high ET, more events are found in the data than in the MC. This might be explained by the limited MC statistics and by air shower events not included in the simulation.
Contact:tancredi.carli@cern.ch, james.proudfoot@cern.ch
SumEt_Base_j20.png
>
>
Distribution of the scalar sum of the transverse energy in all cells measured in the calorimeter (Sum ET) from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo simulation. The MET_Base algorithm (i.e. all cells with |E|>2 sigma are considered for the calculation) is used for the Sum ET calculation. Energy is at the electromagnetic scale. Monte Carlo distribution is normalized to data in the 100-300 GeV range. Only events which have a jet with ET>20 GeV are included. Trigger effects are not considered in the simulation. The measured Sum ET distribution is well described by the simulation. At high ET, more events are found in the data than in the MC. This might be explained by the limited MC statistics and by air shower events not included in the simulation.
SumEt_Base_j20.png
 

[Jet Transverse Energy]

Changed:
<
<
Distribution of jet transverse energy from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. The same normalization factor as for the figure above is applied. The ATLAS Cone Jet algorithm with a cone size 0.4 is used. Calorimeter clusters reconstructed with the topological clustering algorithm are the inputs for the jet reconstruction. Only jets with ET>20 GeV are shown. The jet energy is at the electromagnetic scale. The shape of the distribution is well described by the simulation. At high ET, more events are found in the data than in the MC. This might be explained by the limited MC statistics and by air shower events not included in the simulation.
Contact:tancredi.carli@cern.ch, james.proudfoot@cern.ch
JetEt_TopoR4.png
>
>
Distribution of jet transverse energy from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. The same normalization factor as for the figure above is applied. The ATLAS Cone Jet algorithm with a cone size 0.4 is used. Calorimeter clusters reconstructed with the topological clustering algorithm are the inputs for the jet reconstruction. Only jets with ET>20 GeV are shown. The jet energy is at the electromagnetic scale. The shape of the distribution is well described by the simulation. At high ET, more events are found in the data than in the MC. This might be explained by the limited MC statistics and by air shower events not included in the simulation.
JetEt_TopoR4.png
 

[Jet EM Fraction]

The jet EM fraction is the ratio of the energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. The jet EM fraction from the cosmic L1Calo data stream (run 90272 in Sep. 2008), a cosmic Monte Carlo simulation, and QCD di-jet Monte Carlo samples simulating proton-proton collisions are shown. Only jets with ET>20 GeV are included. The distributions were normalized by the total number of jets (areas are 1). The most likely value for the EM fraction is 0 or 1 for fake jets from cosmics, since the high energy deposit from photons originated from high energetic muons will localize either in the EM or the hadronic calorimeter. The QCD jets have a broad distribution of EM fraction peaking around 0.8. EM fractions less than 0 or larger 1, are due to small negative energy contribution coming from noise. Good separation between real QCD jets and fake jets from cosmics is observed. Selection cuts around 0 and 1 can remove most of the fake jets while keeping most of the jets produced in proton-proton collisions.

Changed:
<
<

Contact:tancredi.carli@cern.ch, james.proudfoot@cern.ch
JetEMF_TopoR4.png
>
>
JetEMF_TopoR4.png
 

[Number of Calorimeter Clusters]

The number of calorimeter clusters in jets from cosmic L1Calo data stream (run 90272 in Sep. 2008), a cosmic Monte Carlo simulation, and QCD di-jet Monte Carlo samples simulating proton-proton collisions. Only jets with ET>20 GeV and |eta| < 3.2 are shown, since the number of clusters do not have much fake rejection power in the forward region due to large granularity. Fake jets tend to have small numbers of clusters. By requiring low cluster multiplicity, most of the fake jets can be removed while keeping most of the jets produced in proton-proton collisions.

Changed:
<
<

Contact:tancredi.carli@cern.ch, james.proudfoot@cern.ch
JetSize_TopoR4.png
>
>
JetSize_TopoR4.png
 

[Jet Transverse Energy Distrubution after Cleaning Cuts]

Changed:
<
<
The distribution of the jet transverse energy from cosmic L1Calo data stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only jets with ET>20 GeV are included in the figure. The blue points are from data, and the red solid lines are from the Monte Carlo. The blue square marks and the red solid distributions are before jet cleaning cuts. The blue open circles and the red dotted lines show distributions after applying a cut on the EM fraction (jets remaining after 0.2 < EM fraction <0.97 is required). The blue triangular marker and the red dash lines show distributions after applying the cut on the EM fraction (0.2 < EM fraction <0.97) and the number of clusters (jets remain when number of clusters >=7). The cuts are used as an illustration of the possible performance of the cleaning cuts.
Contact:tancredi.carli@cern.ch, james.proudfoot@cern.ch
JetEt_TopoR4_Cleaning.png
>
>
The distribution of the jet transverse energy from cosmic L1Calo data stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only jets with ET>20 GeV are included in the figure. The blue points are from data, and the red solid lines are from the Monte Carlo. The blue square marks and the red solid distributions are before jet cleaning cuts. The blue open circles and the red dotted lines show distributions after applying a cut on the EM fraction (jets remaining after 0.2 < EM fraction <0.97 is required). The blue triangular marker and the red dash lines show distributions after applying the cut on the EM fraction (0.2 < EM fraction <0.97) and the number of clusters (jets remain when number of clusters >=7). The cuts are used as an illustration of the possible performance of the cleaning cuts.
JetEt_TopoR4_Cleaning.png
 
Line: 68 to 68
  [Event EM Fraction]
Changed:
<
<
The Event EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), a cosmic Monte Carlo simulation, and QCD di-jet Monte Carlo samples simulating proton-proton collisions. The Event EM fraction is defined for each event as a jet ET weighted-average of the jet EM fraction. Jets with ET>20 GeV are considered. Good separation between real QCD jets and fake jets from cosmics were observed. Event EM fraction is a promising observable to remove events with fake missing ET.
Contact:tancredi.carli@cern.ch, james.proudfoot@cern.ch
EvEMF_TopoR4_j20.png
>
>
The Event EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), a cosmic Monte Carlo simulation, and QCD di-jet Monte Carlo samples simulating proton-proton collisions. The Event EM fraction is defined for each event as a jet ET weighted-average of the jet EM fraction. Jets with ET>20 GeV are considered. Good separation between real QCD jets and fake jets from cosmics were observed. Event EM fraction is a promising observable to remove events with fake missing ET.
EvEMF_TopoR4_j20.png
 

Revision 322009-04-20 - DaveCharlton

Line: 1 to 1
Changed:
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META TOPICPARENT name="HidekiOkawa"

Preliminary Results from High Energetic Cosmic Rays in the Atlas Calorimeter

>
>
META TOPICPARENT name="AtlasResults"

Preliminary Results from Highly Energetic Cosmic Rays in the ATLAS Calorimeter

 
<!--optional-->

Introduction

Line: 93 to 93
 
Changed:
<
<
-- HidekiOkawa - 11 Mar 2009
>
>
 
META FILEATTACHMENT attachment="JetEMF_TopoR4.png" attr="" comment="" date="1238097474" name="JetEMF_TopoR4.png" path="JetEMF_TopoR4.png" size="18007" stream="JetEMF_TopoR4.png" user="Main.HidekiOkawa" version="6"
META FILEATTACHMENT attachment="JetEt_TopoR4.png" attr="" comment="" date="1238096901" name="JetEt_TopoR4.png" path="JetEt_TopoR4.png" size="15255" stream="JetEt_TopoR4.png" user="Main.HidekiOkawa" version="8"
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META FILEATTACHMENT attachment="AirShower_90272_4227806_rZ.png" attr="" comment="" date="1239264768" name="AirShower_90272_4227806_rZ.png" path="AirShower_90272_4227806_rZ.png" size="147780" stream="AirShower_90272_4227806_rZ.png" user="Main.HidekiOkawa" version="1"
META FILEATTACHMENT attachment="AirShower_90272_4227806_XY.png" attr="" comment="" date="1239264782" name="AirShower_90272_4227806_XY.png" path="AirShower_90272_4227806_XY.png" size="266634" stream="AirShower_90272_4227806_XY.png" user="Main.HidekiOkawa" version="1"
META FILEATTACHMENT attachment="EvEMF_TopoR4_j20.png" attr="" comment="" date="1239267496" name="EvEMF_TopoR4_j20.png" path="EvEMF_TopoR4_j20.png" size="18312" stream="EvEMF_TopoR4_j20.png" user="Main.HidekiOkawa" version="1"
Added:
>
>
META TOPICMOVED by="DaveCharlton" date="1240238078" from="Atlas.ApprovedCosmicPlotsJetEtmiss" to="Atlas.ApprovedCosmicPlotsJetEtMiss"

Revision 312009-04-20 - HidekiOkawa

Line: 1 to 1
 
META TOPICPARENT name="HidekiOkawa"

Preliminary Results from High Energetic Cosmic Rays in the Atlas Calorimeter

<!--optional-->
Line: 80 to 80
  [Event Display from a Single Muon Event]
Changed:
<
<
Event display of an event with a single cosmic muon passing through the detector and depositing more than 1 TeV in Tile Calorimeter cells. The green lines show the muon segments. The muon segments are pointing to the IP, due to the lack of RPC hits. The yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the gray marker. The light blue dotted line is the direction of Missing ET. The highlights in the MDT indicate hits (yellow for any hits, and orange when tracks are reconstructed). The X-Y projection and the R-Z projection are shown.

SingleMuon_90272_2006956_xy.pngSingleMuon_90272_2006956_rz.png
>
>
Event display of an event with a single cosmic muon passing through the detector and depositing more than 1 TeV in Tile Calorimeter cells. The green lines show the muon segments. The muon segments in X-Y view are pointing to the interaction point, due to the lack of RPC hits. The yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the gray marker. The light blue dotted line is the direction of Missing ET. The highlights in the MDT indicate hits (yellow for any hits, and orange when tracks are reconstructed). No track was reconstructed in the inner detector for this event. The X-Y projection and the R-Z projection are shown.

SingleMuon_90272_2006956_xy.pngSingleMuon_90272_2006956_rz.png
 
Line: 93 to 93
 
Deleted:
<
<
 -- HidekiOkawa - 11 Mar 2009

META FILEATTACHMENT attachment="JetEMF_TopoR4.png" attr="" comment="" date="1238097474" name="JetEMF_TopoR4.png" path="JetEMF_TopoR4.png" size="18007" stream="JetEMF_TopoR4.png" user="Main.HidekiOkawa" version="6"

Revision 302009-04-14 - HidekiOkawa

Line: 1 to 1
 
META TOPICPARENT name="HidekiOkawa"

Preliminary Results from High Energetic Cosmic Rays in the Atlas Calorimeter

<!--optional-->
Line: 80 to 80
  [Event Display from a Single Muon Event]
Changed:
<
<
Event display of an event with a single cosmic muon passing through the detector and depositing more than 1 TeV in Tile Calorimeter cells. The green lines show the muon segments. Segments are pointing to the IP, due to the lack of RPC hits. The yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the gray marker. The light blue dotted line is the direction of Missing ET. The highlights in the MDT indicate hits (yellow for any hits, and orange when tracks are reconstructed). The X-Y projection and the R-Z projection are shown.

SingleMuon_90272_2006956_xy.pngSingleMuon_90272_2006956_rz.png
>
>
Event display of an event with a single cosmic muon passing through the detector and depositing more than 1 TeV in Tile Calorimeter cells. The green lines show the muon segments. The muon segments are pointing to the IP, due to the lack of RPC hits. The yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the gray marker. The light blue dotted line is the direction of Missing ET. The highlights in the MDT indicate hits (yellow for any hits, and orange when tracks are reconstructed). The X-Y projection and the R-Z projection are shown.

SingleMuon_90272_2006956_xy.pngSingleMuon_90272_2006956_rz.png
 

Revision 292009-04-14 - HidekiOkawa

Line: 1 to 1
 
META TOPICPARENT name="HidekiOkawa"

Preliminary Results from High Energetic Cosmic Rays in the Atlas Calorimeter

<!--optional-->
Line: 80 to 80
  [Event Display from a Single Muon Event]
Changed:
<
<
Event display of an event with a single cosmic muon passing through the detector and depositing 1.23 TeV in one Tile Calorimeter cell. The green lines show the muon segments. The yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the gray marker. The light blue dotted line is the direction of Missing ET. The highlights in the MDT indicate hits (yellow for any hits, and orange when tracks are reconstructed). The X-Y projection and the R-Z projection are shown.

SingleMuon_90272_2006956_xy.pngSingleMuon_90272_2006956_rz.png
>
>
Event display of an event with a single cosmic muon passing through the detector and depositing more than 1 TeV in Tile Calorimeter cells. The green lines show the muon segments. Segments are pointing to the IP, due to the lack of RPC hits. The yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the gray marker. The light blue dotted line is the direction of Missing ET. The highlights in the MDT indicate hits (yellow for any hits, and orange when tracks are reconstructed). The X-Y projection and the R-Z projection are shown.

SingleMuon_90272_2006956_xy.pngSingleMuon_90272_2006956_rz.png
 

Revision 282009-04-09 - HidekiOkawa

Line: 1 to 1
 
META TOPICPARENT name="HidekiOkawa"

Preliminary Results from High Energetic Cosmic Rays in the Atlas Calorimeter

<!--optional-->
Line: 36 to 36
 
Deleted:
<
<
[Missing ET]

Distribution of the missing transverse energy measured in the calorimeter (missing ET) from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo simulation. The MET_Base algorithm (i.e. all cells with |E|>2 sigma are considered for the calculation) is used for the missing ET calculation. Energy is at the electromagnetic scale. The same normalization factor as for the figure above is applied. Only events which have a jet with ET>20 GeV are included. Trigger effects are not considered in the simulation. The measured Missing ET distribution is well described by the simulation. At large missing ET, more events are found in the data than in the MC. This might be explained by the limited MC statistics and by air shower events not included in the simulation.
Contact: tancredi.carli@cern.ch, james.proudfoot@cern.ch

Met_Base_j20.png
 [Jet Transverse Energy]

Distribution of jet transverse energy from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. The same normalization factor as for the figure above is applied. The ATLAS Cone Jet algorithm with a cone size 0.4 is used. Calorimeter clusters reconstructed with the topological clustering algorithm are the inputs for the jet reconstruction. Only jets with ET>20 GeV are shown. The jet energy is at the electromagnetic scale. The shape of the distribution is well described by the simulation. At high ET, more events are found in the data than in the MC. This might be explained by the limited MC statistics and by air shower events not included in the simulation.
Contact: tancredi.carli@cern.ch, james.proudfoot@cern.ch

JetEt_TopoR4.png
Line: 75 to 68
  [Event EM Fraction]
Changed:
<
<
The Event EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), a cosmic Monte Carlo simulation, and QCD di-jet Monte Carlo samples simulating proton-proton collisions. The Event EM fraction is defined for each event as a jet ET weighted-average of the jet EM fraction. Jets with ET>7 GeV are considered. Good separation between real QCD jets and fake jets from cosmics were observed. Event EM fraction is a promising observable to remove events with fake missing ET.
Contact:tancredi.carli@cern.ch, james.proudfoot@cern.ch
EvEMF_TopoR4_j20.png
>
>
The Event EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), a cosmic Monte Carlo simulation, and QCD di-jet Monte Carlo samples simulating proton-proton collisions. The Event EM fraction is defined for each event as a jet ET weighted-average of the jet EM fraction. Jets with ET>20 GeV are considered. Good separation between real QCD jets and fake jets from cosmics were observed. Event EM fraction is a promising observable to remove events with fake missing ET.
Contact:tancredi.carli@cern.ch, james.proudfoot@cern.ch
EvEMF_TopoR4_j20.png
 

Revision 272009-04-09 - HidekiOkawa

Line: 1 to 1
 
META TOPICPARENT name="HidekiOkawa"

Preliminary Results from High Energetic Cosmic Rays in the Atlas Calorimeter

<!--optional-->
Line: 36 to 36
 
Added:
>
>
[Missing ET]

Distribution of the missing transverse energy measured in the calorimeter (missing ET) from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo simulation. The MET_Base algorithm (i.e. all cells with |E|>2 sigma are considered for the calculation) is used for the missing ET calculation. Energy is at the electromagnetic scale. The same normalization factor as for the figure above is applied. Only events which have a jet with ET>20 GeV are included. Trigger effects are not considered in the simulation. The measured Missing ET distribution is well described by the simulation. At large missing ET, more events are found in the data than in the MC. This might be explained by the limited MC statistics and by air shower events not included in the simulation.
Contact: tancredi.carli@cern.ch, james.proudfoot@cern.ch

Met_Base_j20.png
 [Jet Transverse Energy]

Distribution of jet transverse energy from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. The same normalization factor as for the figure above is applied. The ATLAS Cone Jet algorithm with a cone size 0.4 is used. Calorimeter clusters reconstructed with the topological clustering algorithm are the inputs for the jet reconstruction. Only jets with ET>20 GeV are shown. The jet energy is at the electromagnetic scale. The shape of the distribution is well described by the simulation. At high ET, more events are found in the data than in the MC. This might be explained by the limited MC statistics and by air shower events not included in the simulation.
Contact: tancredi.carli@cern.ch, james.proudfoot@cern.ch

JetEt_TopoR4.png
Line: 68 to 75
  [Event EM Fraction]
Changed:
<
<
The Event EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), a cosmic Monte Carlo simulation, and QCD di-jet Monte Carlo samples simulating proton-proton collisions. The Event EM fraction is defined for each event as a jet ET weighted-average of the jet EM fraction. Jets with ET>7 GeV are considered. Good separation between real QCD jets and fake jets from cosmics were observed. Event EM fraction is a promising observable to remove events with fake missing ET.
Contact:tancredi.carli@cern.ch, james.proudfoot@cern.ch
EvEMF_TopoR4.png
>
>
The Event EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), a cosmic Monte Carlo simulation, and QCD di-jet Monte Carlo samples simulating proton-proton collisions. The Event EM fraction is defined for each event as a jet ET weighted-average of the jet EM fraction. Jets with ET>7 GeV are considered. Good separation between real QCD jets and fake jets from cosmics were observed. Event EM fraction is a promising observable to remove events with fake missing ET.
Contact:tancredi.carli@cern.ch, james.proudfoot@cern.ch
EvEMF_TopoR4_j20.png
 
Line: 80 to 87
  [Event Display from a Single Muon Event]
Changed:
<
<
Event display of an event with a single cosmic muon passing through the detector and depositing 1.23 TeV in one Tile Calorimeter cell. The green lines show the muon segments. The yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the gray marker. The light blue dotted line is the direction of Missing ET. The highlights in the MDT indicate hits (yellow for any hits, and orange when tracks are reconstructed). The X-Y projection and the R-Z projection are shown.

SingleMuon_90272_2006956_xy.pngSingleMuon_90272_2006956_rz.png
>
>
Event display of an event with a single cosmic muon passing through the detector and depositing 1.23 TeV in one Tile Calorimeter cell. The green lines show the muon segments. The yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the gray marker. The light blue dotted line is the direction of Missing ET. The highlights in the MDT indicate hits (yellow for any hits, and orange when tracks are reconstructed). The X-Y projection and the R-Z projection are shown.

SingleMuon_90272_2006956_xy.pngSingleMuon_90272_2006956_rz.png
 
Line: 88 to 95
  [Event Display from an Air Shower Event]
Changed:
<
<
Event display of an air shower event. The green lines show the muon segments. The yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the gray marker. The light blue dotted line is the direction of Missing ET. The yellow highlights in the MDT indicate hits. The X-Y projection and the R-Z projection are shown.

AirShower_90272_4227806_xy.pngAirShower_90272_4227806_rz.png
>
>
Event display of an air shower event. The green lines show the muon segments. The yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the gray marker. The light blue dotted line is the direction of Missing ET. The yellow highlights in the MDT indicate hits. The X-Y projection and the R-Z projection are shown.

AirShower_90272_4227806_xy.pngAirShower_90272_4227806_rz.png
 
Line: 118 to 125
 
META FILEATTACHMENT attachment="SingleMuon_90272_2006956_xy.png" attr="" comment="" date="1238427648" name="SingleMuon_90272_2006956_xy.png" path="SingleMuon_90272_2006956_xy.png" size="407531" stream="SingleMuon_90272_2006956_xy.png" user="Main.HidekiOkawa" version="1"
META FILEATTACHMENT attachment="AirShower_90272_4227806_rz.png" attr="" comment="" date="1238429455" name="AirShower_90272_4227806_rz.png" path="AirShower_90272_4227806_rz.png" size="234107" stream="AirShower_90272_4227806_rz.png" user="Main.HidekiOkawa" version="1"
META FILEATTACHMENT attachment="AirShower_90272_4227806_xy.png" attr="" comment="" date="1238429863" name="AirShower_90272_4227806_xy.png" path="AirShower_90272_4227806_xy.png" size="426737" stream="AirShower_90272_4227806_xy.png" user="Main.HidekiOkawa" version="1"
Added:
>
>
META FILEATTACHMENT attachment="Met_Base_j20.png" attr="" comment="" date="1239264554" name="Met_Base_j20.png" path="Met_Base_j20.png" size="14918" stream="Met_Base_j20.png" user="Main.HidekiOkawa" version="1"
META FILEATTACHMENT attachment="SingleMuon_90272_214077_rZ.png" attr="" comment="" date="1239264624" name="SingleMuon_90272_214077_rZ.png" path="SingleMuon_90272_214077_rZ.png" size="23076" stream="SingleMuon_90272_214077_rZ.png" user="Main.HidekiOkawa" version="1"
META FILEATTACHMENT attachment="SingleMuon_90272_214077_XY.png" attr="" comment="" date="1239264640" name="SingleMuon_90272_214077_XY.png" path="SingleMuon_90272_214077_XY.png" size="266020" stream="SingleMuon_90272_214077_XY.png" user="Main.HidekiOkawa" version="1"
META FILEATTACHMENT attachment="AirShower_90272_4227806_rZ.png" attr="" comment="" date="1239264768" name="AirShower_90272_4227806_rZ.png" path="AirShower_90272_4227806_rZ.png" size="147780" stream="AirShower_90272_4227806_rZ.png" user="Main.HidekiOkawa" version="1"
META FILEATTACHMENT attachment="AirShower_90272_4227806_XY.png" attr="" comment="" date="1239264782" name="AirShower_90272_4227806_XY.png" path="AirShower_90272_4227806_XY.png" size="266634" stream="AirShower_90272_4227806_XY.png" user="Main.HidekiOkawa" version="1"
META FILEATTACHMENT attachment="EvEMF_TopoR4_j20.png" attr="" comment="" date="1239267496" name="EvEMF_TopoR4_j20.png" path="EvEMF_TopoR4_j20.png" size="18312" stream="EvEMF_TopoR4_j20.png" user="Main.HidekiOkawa" version="1"

Revision 262009-03-30 - HidekiOkawa

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META TOPICPARENT name="HidekiOkawa"

Preliminary Results from High Energetic Cosmic Rays in the Atlas Calorimeter

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Line: 32 to 32
  [SumET]
Changed:
<
<
Distribution of the scalar sum of the transverse energy in all cells measured in the calorimeter (Sum ET) from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo simulation. The MET_Base algorithm (i.e. all cells with |E|>2 sigma are considered for the calculation) is used for the Sum ET calculation. Energy is at the electromagnetic scale. Monte Carlo distribution is normalized to data in the 100-300 GeV range. Only events which have a jet with ET>20 GeV are included. Trigger effects are not considered in the simulation. The measured Sum ET distribution is well described by the simulation. At high ET, more events are found in the data than in the MC. This might be explained by the limited MC statistics and by air shower events not included in the simulation.
Contact:Tancredi Carli, James Proudfoot
SumEt_Base_j20.png
>
>
Distribution of the scalar sum of the transverse energy in all cells measured in the calorimeter (Sum ET) from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo simulation. The MET_Base algorithm (i.e. all cells with |E|>2 sigma are considered for the calculation) is used for the Sum ET calculation. Energy is at the electromagnetic scale. Monte Carlo distribution is normalized to data in the 100-300 GeV range. Only events which have a jet with ET>20 GeV are included. Trigger effects are not considered in the simulation. The measured Sum ET distribution is well described by the simulation. At high ET, more events are found in the data than in the MC. This might be explained by the limited MC statistics and by air shower events not included in the simulation.
Contact:tancredi.carli@cern.ch, james.proudfoot@cern.ch
SumEt_Base_j20.png
 

[Jet Transverse Energy]

Changed:
<
<
Distribution of jet transverse energy from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. The same normalization factor as for the figure above is applied. The ATLAS Cone Jet algorithm with a cone size 0.4 is used. Calorimeter clusters reconstructed with the topological clustering algorithm are the inputs for the jet reconstruction. Only jets with ET>20 GeV are shown. The jet energy is at the electromagnetic scale. The shape of the distribution is well described by the simulation. At high ET, more events are found in the data than in the MC. This might be explained by the limited MC statistics and by air shower events not included in the simulation.
Contact:Tancredi Carli, James Proudfoot
JetEt_TopoR4.png
>
>
Distribution of jet transverse energy from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. The same normalization factor as for the figure above is applied. The ATLAS Cone Jet algorithm with a cone size 0.4 is used. Calorimeter clusters reconstructed with the topological clustering algorithm are the inputs for the jet reconstruction. Only jets with ET>20 GeV are shown. The jet energy is at the electromagnetic scale. The shape of the distribution is well described by the simulation. At high ET, more events are found in the data than in the MC. This might be explained by the limited MC statistics and by air shower events not included in the simulation.
Contact:tancredi.carli@cern.ch, james.proudfoot@cern.ch
JetEt_TopoR4.png
 

[Jet EM Fraction]

Changed:
<
<
The jet EM fraction is the ratio of the energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. The jet EM fraction from the cosmic L1Calo data stream (run 90272 in Sep. 2008), a cosmic Monte Carlo simulation, and QCD di-jet Monte Carlo samples simulating p-p collisions are shown. Only jets with ET>20 GeV are included. The distributions were normalized by the total number of jets (areas are 1). The most likely value for the EM fraction is 0 or 1 for fake jets from cosmics, since the high energy deposit from photons originated from high energetic muons will localize either in the EM or the hadronic calorimeter. The QCD jets have a broad distribution of EM fraction peaking around 0.8. EM fractions less than 0 or larger 1, are due to small negative energy contribution coming from noise. Good separation between real QCD jets and fake jets from cosmics is observed. Selection cuts around 0 and 1 can remove most of the fake jets while keeping most of the jets produced in proton-proton collisions.
>
>
The jet EM fraction is the ratio of the energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. The jet EM fraction from the cosmic L1Calo data stream (run 90272 in Sep. 2008), a cosmic Monte Carlo simulation, and QCD di-jet Monte Carlo samples simulating proton-proton collisions are shown. Only jets with ET>20 GeV are included. The distributions were normalized by the total number of jets (areas are 1). The most likely value for the EM fraction is 0 or 1 for fake jets from cosmics, since the high energy deposit from photons originated from high energetic muons will localize either in the EM or the hadronic calorimeter. The QCD jets have a broad distribution of EM fraction peaking around 0.8. EM fractions less than 0 or larger 1, are due to small negative energy contribution coming from noise. Good separation between real QCD jets and fake jets from cosmics is observed. Selection cuts around 0 and 1 can remove most of the fake jets while keeping most of the jets produced in proton-proton collisions.
 
Changed:
<
<

Contact:Tancredi Carli, James Proudfoot
JetEMF_TopoR4.png
>
>

Contact:tancredi.carli@cern.ch, james.proudfoot@cern.ch
JetEMF_TopoR4.png
 

[Number of Calorimeter Clusters]

Changed:
<
<
The number of calorimeter clusters in jets from cosmic L1Calo data stream (run 90272 in Sep. 2008), a cosmic Monte Carlo simulation, and QCD di-jet Monte Carlo samples simulating p-p collisions. Only jets with ET>20 GeV and |eta| < 3.2 are shown, since the number of clusters do not have much fake rejection power in the forward region due to large granularity. Fake jets tend to have small numbers of clusters. By requiring low cluster multiplicity, most of the fake jets can be removed while keeping most of the jets produced in proton-proton collisions.
>
>
The number of calorimeter clusters in jets from cosmic L1Calo data stream (run 90272 in Sep. 2008), a cosmic Monte Carlo simulation, and QCD di-jet Monte Carlo samples simulating proton-proton collisions. Only jets with ET>20 GeV and |eta| < 3.2 are shown, since the number of clusters do not have much fake rejection power in the forward region due to large granularity. Fake jets tend to have small numbers of clusters. By requiring low cluster multiplicity, most of the fake jets can be removed while keeping most of the jets produced in proton-proton collisions.
 
Changed:
<
<

Contact:Tancredi Carli, James Proudfoot
JetSize_TopoR4.png
>
>

Contact:tancredi.carli@cern.ch, james.proudfoot@cern.ch
JetSize_TopoR4.png
 

[Jet Transverse Energy Distrubution after Cleaning Cuts]

Changed:
<
<
The distribution of the jet transverse energy from cosmic L1Calo data stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only jets with ET>20 GeV are included in the figure. The blue points are from data, and the red solid lines are from the Monte Carlo. The blue square marks and the red solid distributions are before jet cleaning cuts. The blue open circles and the red dotted lines show distributions after applying a cut on EM fraction (jets remaining after 0.2 < EM fraction <0.97 is required). The blue triangular marker and the red dash lines show distributions after applying the cut on EM fraction (0.2 < EM fraction <0.97) and the number of clusters (jets remain when number of clusters >=7). The cuts are used as an illustration of the possible performance of the cleaning cuts.
Contact:Tancredi Carli, James Proudfoot
JetEt_TopoR4_Cleaning.png
>
>
The distribution of the jet transverse energy from cosmic L1Calo data stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only jets with ET>20 GeV are included in the figure. The blue points are from data, and the red solid lines are from the Monte Carlo. The blue square marks and the red solid distributions are before jet cleaning cuts. The blue open circles and the red dotted lines show distributions after applying a cut on the EM fraction (jets remaining after 0.2 < EM fraction <0.97 is required). The blue triangular marker and the red dash lines show distributions after applying the cut on the EM fraction (0.2 < EM fraction <0.97) and the number of clusters (jets remain when number of clusters >=7). The cuts are used as an illustration of the possible performance of the cleaning cuts.
Contact:tancredi.carli@cern.ch, james.proudfoot@cern.ch
JetEt_TopoR4_Cleaning.png
 
Line: 68 to 68
  [Event EM Fraction]
Changed:
<
<
The Event EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), a cosmic Monte Carlo simulation, and QCD di-jet Monte Carlo samples simulating p-p collisions. The Event EM fraction is defined for each event as a jet ET weighted-average of the jet EM fraction. Jets with ET>7 GeV are considered. Good separation between real QCD jets and fake jets from cosmics were observed. Event EM fraction is a promising observable to remove events with fake missing ET.
Contact:Tancredi Carli, James Proudfoot
EvEMF_TopoR4.png
>
>
The Event EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), a cosmic Monte Carlo simulation, and QCD di-jet Monte Carlo samples simulating proton-proton collisions. The Event EM fraction is defined for each event as a jet ET weighted-average of the jet EM fraction. Jets with ET>7 GeV are considered. Good separation between real QCD jets and fake jets from cosmics were observed. Event EM fraction is a promising observable to remove events with fake missing ET.
Contact:tancredi.carli@cern.ch, james.proudfoot@cern.ch
EvEMF_TopoR4.png
 

Revision 252009-03-30 - HidekiOkawa

Line: 1 to 1
 
META TOPICPARENT name="HidekiOkawa"

Preliminary Results from High Energetic Cosmic Rays in the Atlas Calorimeter

<!--optional-->
Line: 30 to 30
 
Added:
>
>
[SumET]
 Distribution of the scalar sum of the transverse energy in all cells measured in the calorimeter (Sum ET) from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo simulation. The MET_Base algorithm (i.e. all cells with |E|>2 sigma are considered for the calculation) is used for the Sum ET calculation. Energy is at the electromagnetic scale. Monte Carlo distribution is normalized to data in the 100-300 GeV range. Only events which have a jet with ET>20 GeV are included. Trigger effects are not considered in the simulation. The measured Sum ET distribution is well described by the simulation. At high ET, more events are found in the data than in the MC. This might be explained by the limited MC statistics and by air shower events not included in the simulation.
Contact:Tancredi Carli, James Proudfoot

SumEt_Base_j20.png
Added:
>
>
[Jet Transverse Energy]
 Distribution of jet transverse energy from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. The same normalization factor as for the figure above is applied. The ATLAS Cone Jet algorithm with a cone size 0.4 is used. Calorimeter clusters reconstructed with the topological clustering algorithm are the inputs for the jet reconstruction. Only jets with ET>20 GeV are shown. The jet energy is at the electromagnetic scale. The shape of the distribution is well described by the simulation. At high ET, more events are found in the data than in the MC. This might be explained by the limited MC statistics and by air shower events not included in the simulation.
Contact:Tancredi Carli, James Proudfoot

JetEt_TopoR4.png
Added:
>
>
[Jet EM Fraction]
 The jet EM fraction is the ratio of the energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. The jet EM fraction from the cosmic L1Calo data stream (run 90272 in Sep. 2008), a cosmic Monte Carlo simulation, and QCD di-jet Monte Carlo samples simulating p-p collisions are shown. Only jets with ET>20 GeV are included. The distributions were normalized by the total number of jets (areas are 1). The most likely value for the EM fraction is 0 or 1 for fake jets from cosmics, since the high energy deposit from photons originated from high energetic muons will localize either in the EM or the hadronic calorimeter. The QCD jets have a broad distribution of EM fraction peaking around 0.8. EM fractions less than 0 or larger 1, are due to small negative energy contribution coming from noise. Good separation between real QCD jets and fake jets from cosmics is observed. Selection cuts around 0 and 1 can remove most of the fake jets while keeping most of the jets produced in proton-proton collisions.


Contact: Tancredi Carli, James Proudfoot

JetEMF_TopoR4.png
Added:
>
>
[Number of Calorimeter Clusters]
 The number of calorimeter clusters in jets from cosmic L1Calo data stream (run 90272 in Sep. 2008), a cosmic Monte Carlo simulation, and QCD di-jet Monte Carlo samples simulating p-p collisions. Only jets with ET>20 GeV and |eta| < 3.2 are shown, since the number of clusters do not have much fake rejection power in the forward region due to large granularity. Fake jets tend to have small numbers of clusters. By requiring low cluster multiplicity, most of the fake jets can be removed while keeping most of the jets produced in proton-proton collisions.


Contact: Tancredi Carli, James Proudfoot

JetSize_TopoR4.png
Added:
>
>
[Jet Transverse Energy Distrubution after Cleaning Cuts]
 The distribution of the jet transverse energy from cosmic L1Calo data stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only jets with ET>20 GeV are included in the figure. The blue points are from data, and the red solid lines are from the Monte Carlo. The blue square marks and the red solid distributions are before jet cleaning cuts. The blue open circles and the red dotted lines show distributions after applying a cut on EM fraction (jets remaining after 0.2 < EM fraction <0.97 is required). The blue triangular marker and the red dash lines show distributions after applying the cut on EM fraction (0.2 < EM fraction <0.97) and the number of clusters (jets remain when number of clusters >=7). The cuts are used as an illustration of the possible performance of the cleaning cuts.
Contact:Tancredi Carli, James Proudfoot

JetEt_TopoR4_Cleaning.png
Added:
>
>
[Event EM Fraction]
 The Event EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), a cosmic Monte Carlo simulation, and QCD di-jet Monte Carlo samples simulating p-p collisions. The Event EM fraction is defined for each event as a jet ET weighted-average of the jet EM fraction. Jets with ET>7 GeV are considered. Good separation between real QCD jets and fake jets from cosmics were observed. Event EM fraction is a promising observable to remove events with fake missing ET.
Contact:Tancredi Carli, James Proudfoot

EvEMF_TopoR4.png
Line: 66 to 78
 
Changed:
<
<
Event display of an event with a single cosmic muon passing through the detector and depositing 1.23 TeV in one Tile Calorimeter cell. The green line shows a reconstructed muon track and muon segments. The yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the pink marker and the circle. The orange dotted line is the direction of Missing ET. The red dots show hits in the RPC and TGC Muon Triggers. The bottom figure is the same event display with pulse shape from Tile Calorimeter PMT's (2 upper figures) and Liquid Argon cells (2 lower figures).

90272_L1Calo_ev2006956_1.png90272_L1Calo_ev2006956_withPulse.png
>
>
[Event Display from a Single Muon Event]

Event display of an event with a single cosmic muon passing through the detector and depositing 1.23 TeV in one Tile Calorimeter cell. The green lines show the muon segments. The yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the gray marker. The light blue dotted line is the direction of Missing ET. The highlights in the MDT indicate hits (yellow for any hits, and orange when tracks are reconstructed). The X-Y projection and the R-Z projection are shown.

SingleMuon_90272_2006956_xy.pngSingleMuon_90272_2006956_rz.png
 

Changed:
<
<
Event display of an air shower event. The green line shows muon segments. The yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the pink marker and the circle. The orange dotted line is the direction of Missing ET. The red dots show hits in the RPC and TGC Muon Triggers. The bottom figure is the same event display with pulse shape from Tile Calorimeter PMT's (3 upper figures) and Liquid Argon cells (the figure at the bottom).

90272_L1Calo_ev4227806.png90272_L1Calo_ev4227806_withPulse.png
>
>
[Event Display from an Air Shower Event]

Event display of an air shower event. The green lines show the muon segments. The yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the gray marker. The light blue dotted line is the direction of Missing ET. The yellow highlights in the MDT indicate hits. The X-Y projection and the R-Z projection are shown.

AirShower_90272_4227806_xy.pngAirShower_90272_4227806_rz.png
 
Line: 98 to 114
 
META FILEATTACHMENT attachment="90272_L1Calo_ev4227806_withPulse.png" attr="" comment="" date="1237324739" name="90272_L1Calo_ev4227806_withPulse.png" path="90272_L1Calo_ev4227806_withPulse.png" size="181929" stream="90272_L1Calo_ev4227806_withPulse.png" user="Main.HidekiOkawa" version="1"
META FILEATTACHMENT attachment="JetEtMiss_CosmicPlotsForApproval.pdf" attr="" comment="" date="1237499070" name="JetEtMiss_CosmicPlotsForApproval.pdf" path="JetEtMiss_CosmicPlotsForApproval.pdf" size="898970" stream="JetEtMiss_CosmicPlotsForApproval.pdf" user="Main.HidekiOkawa" version="1"
META FILEATTACHMENT attachment="SumEt_MCCompare_j20.eps" attr="" comment="" date="1238096466" name="SumEt_MCCompare_j20.eps" path="SumEt_MCCompare_j20.eps" size="15406" stream="SumEt_MCCompare_j20.eps" user="Main.HidekiOkawa" version="1"
Added:
>
>
META FILEATTACHMENT attachment="SingleMuon_90272_2006956_rz.png" attr="" comment="" date="1238427609" name="SingleMuon_90272_2006956_rz.png" path="SingleMuon_90272_2006956_rz.png" size="47909" stream="SingleMuon_90272_2006956_rz.png" user="Main.HidekiOkawa" version="1"
META FILEATTACHMENT attachment="SingleMuon_90272_2006956_xy.png" attr="" comment="" date="1238427648" name="SingleMuon_90272_2006956_xy.png" path="SingleMuon_90272_2006956_xy.png" size="407531" stream="SingleMuon_90272_2006956_xy.png" user="Main.HidekiOkawa" version="1"
META FILEATTACHMENT attachment="AirShower_90272_4227806_rz.png" attr="" comment="" date="1238429455" name="AirShower_90272_4227806_rz.png" path="AirShower_90272_4227806_rz.png" size="234107" stream="AirShower_90272_4227806_rz.png" user="Main.HidekiOkawa" version="1"
META FILEATTACHMENT attachment="AirShower_90272_4227806_xy.png" attr="" comment="" date="1238429863" name="AirShower_90272_4227806_xy.png" path="AirShower_90272_4227806_xy.png" size="426737" stream="AirShower_90272_4227806_xy.png" user="Main.HidekiOkawa" version="1"

Revision 242009-03-30 - HidekiOkawa

Line: 1 to 1
 
META TOPICPARENT name="HidekiOkawa"

Preliminary Results from High Energetic Cosmic Rays in the Atlas Calorimeter

<!--optional-->
Line: 30 to 30
 
Changed:
<
<
Distribution of the scalar sum of the transverse energy in all cells measured in the calorimeter (Sum ET) from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo simulation. The MET_Base algorithm (i.e. all cells with |E|>2 sigma are considered for the calculation) is used for the Sum ET calculation. Energy is at the electromagnetic scale. Monte Carlo distribution is normalized to data in the 100-300 GeV range. Only events which have a jet with ET>20 GeV are included. Trigger effects are not considered in the simulation. The measured Sum ET distribution is well described by the simulation. At high ET, we also observed some air shower events, which are not included in the simulation.
Contact:Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
SumEt_Base_j20.png
>
>
Distribution of the scalar sum of the transverse energy in all cells measured in the calorimeter (Sum ET) from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo simulation. The MET_Base algorithm (i.e. all cells with |E|>2 sigma are considered for the calculation) is used for the Sum ET calculation. Energy is at the electromagnetic scale. Monte Carlo distribution is normalized to data in the 100-300 GeV range. Only events which have a jet with ET>20 GeV are included. Trigger effects are not considered in the simulation. The measured Sum ET distribution is well described by the simulation. At high ET, more events are found in the data than in the MC. This might be explained by the limited MC statistics and by air shower events not included in the simulation.
Contact:Tancredi Carli, James Proudfoot
SumEt_Base_j20.png
 
Changed:
<
<
Distribution of jet transverse energy from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only single muons are considered in the Monte Carlo (no air showers). The same normalization factor as for the figure above is applied. The ATLAS Cone Jet algorithm with a cone size 0.4 is used. Topoclusters are the inputs for the jet reconstruction. Only jets with ET>20 GeV were included in the figure. Jet energy is at the EM scale. The shape of the distribution is well described by the simulation. At high ET, we also observed some air shower events, which are not included in the simulation.
Contact:Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEt_TopoR4.png
>
>
Distribution of jet transverse energy from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. The same normalization factor as for the figure above is applied. The ATLAS Cone Jet algorithm with a cone size 0.4 is used. Calorimeter clusters reconstructed with the topological clustering algorithm are the inputs for the jet reconstruction. Only jets with ET>20 GeV are shown. The jet energy is at the electromagnetic scale. The shape of the distribution is well described by the simulation. At high ET, more events are found in the data than in the MC. This might be explained by the limited MC statistics and by air shower events not included in the simulation.
Contact:Tancredi Carli, James Proudfoot
JetEt_TopoR4.png
 
Changed:
<
<
The jet EM fraction is the ratio of the energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. The jet EM fraction from the cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples are shown in the figure. Only single muons are considered in the Monte Carlo (no air showers). Only jets with ET>20 GeV were included in the figure. The distributions were normalized by the total number of jets (areas are 1). The most likely value for the EM fraction is 0 or 1 for fake jets from cosmics, since the high energy deposit from photons originated from high energetic muons will localize either in the EM or the hadronic calorimeter. The QCD jets have a broad distribution of EM fraction peaking around 0.8. EM fraction less than 0 or larger 1, is due to small negative energy contribution coming from noise. Good separation between real QCD jets and fake jets from cosmics were observed. The EM fraction larger than 1 is possible, since noise clusters that can give negative energy contributions are included in jets. Selection cuts around 0 and 1 can remove most of the fake jets while keeping most of the jets produced in proton-proton collisions.
>
>
The jet EM fraction is the ratio of the energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. The jet EM fraction from the cosmic L1Calo data stream (run 90272 in Sep. 2008), a cosmic Monte Carlo simulation, and QCD di-jet Monte Carlo samples simulating p-p collisions are shown. Only jets with ET>20 GeV are included. The distributions were normalized by the total number of jets (areas are 1). The most likely value for the EM fraction is 0 or 1 for fake jets from cosmics, since the high energy deposit from photons originated from high energetic muons will localize either in the EM or the hadronic calorimeter. The QCD jets have a broad distribution of EM fraction peaking around 0.8. EM fractions less than 0 or larger 1, are due to small negative energy contribution coming from noise. Good separation between real QCD jets and fake jets from cosmics is observed. Selection cuts around 0 and 1 can remove most of the fake jets while keeping most of the jets produced in proton-proton collisions.
 
Changed:
<
<

Contact:Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEMF_TopoR4.png
>
>

Contact:Tancredi Carli, James Proudfoot
JetEMF_TopoR4.png
 
Changed:
<
<
The number of calorimeter clusters in jets from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). Topoclusters are used as the inputs to jets. Only jets with ET>20 GeV and |eta| < 3.2 were included in the figure, since the number of clusters do not have much fake rejection power in the forward region due to large granularity. Fake jets tend to have small numbers of clusters. Selection cuts around 6 can remove most of the fake jets while keeping most of the jets produced in proton-proton collisions.
>
>
The number of calorimeter clusters in jets from cosmic L1Calo data stream (run 90272 in Sep. 2008), a cosmic Monte Carlo simulation, and QCD di-jet Monte Carlo samples simulating p-p collisions. Only jets with ET>20 GeV and |eta| < 3.2 are shown, since the number of clusters do not have much fake rejection power in the forward region due to large granularity. Fake jets tend to have small numbers of clusters. By requiring low cluster multiplicity, most of the fake jets can be removed while keeping most of the jets produced in proton-proton collisions.
 
Changed:
<
<

Contact:Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetSize_TopoR4.png
>
>

Contact:Tancredi Carli, James Proudfoot
JetSize_TopoR4.png
 
Changed:
<
<
The distribution of jet transverse energy from cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only jets with ET>20 GeV were included in the figure. The blue points are from data, and the red solid lines are from the Monte Carlo. The blue square marks and the red solid distributions are before jet cleaning cuts. The blue open circles and the red dotted lines show distributions after applying a cut on EM fraction (jets remain when 0.2 < EM fraction <0.97). The blue triangular marker and the red dash lines show distributions after applying the cut on EM fraction (0.2 < EM fraction <0.97) and the number of clusters (jets remain when number of clusters >=7). This is an example to show the performance of cleaning cuts.
Contact:Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEt_TopoR4_Cleaning.png
>
>
The distribution of the jet transverse energy from cosmic L1Calo data stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only jets with ET>20 GeV are included in the figure. The blue points are from data, and the red solid lines are from the Monte Carlo. The blue square marks and the red solid distributions are before jet cleaning cuts. The blue open circles and the red dotted lines show distributions after applying a cut on EM fraction (jets remaining after 0.2 < EM fraction <0.97 is required). The blue triangular marker and the red dash lines show distributions after applying the cut on EM fraction (0.2 < EM fraction <0.97) and the number of clusters (jets remain when number of clusters >=7). The cuts are used as an illustration of the possible performance of the cleaning cuts.
Contact:Tancredi Carli, James Proudfoot
JetEt_TopoR4_Cleaning.png
 

Changed:
<
<
The Event EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. The Event EM fraction is defined for each event as a jet ET weighted-average of the jet EM fraction. Jets with ET>7 GeV are considered. Good separation between real QCD jets and fake jets from cosmics were observed. Event EM fraction is a promising observable to remove events with fake missing ET.
Contact:Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
EvEMF_TopoR4.png
>
>
The Event EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), a cosmic Monte Carlo simulation, and QCD di-jet Monte Carlo samples simulating p-p collisions. The Event EM fraction is defined for each event as a jet ET weighted-average of the jet EM fraction. Jets with ET>7 GeV are considered. Good separation between real QCD jets and fake jets from cosmics were observed. Event EM fraction is a promising observable to remove events with fake missing ET.
Contact:Tancredi Carli, James Proudfoot
EvEMF_TopoR4.png
 
Line: 66 to 66
 
Changed:
<
<
Event display of an event with a single cosmic muon passing through the detector and depositing 1.23 TeV in 1 Tile Calorimeter cell. The green line shows a reconstructed muon track and muon segments. The yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the pink marker and the circle. The orange dotted line is the direction of Missing ET. The red dots show hits in the RPC and TGC Muon Triggers. The bottom figure is the same event display with pulse shape from Tile Calorimeter PMT's (2 upper figures) and Liquid Argon cells (2 lower figures).
Contact:Hideki.Okawa@cern.ch
Reference:
90272_L1Calo_ev2006956_1.png90272_L1Calo_ev2006956_withPulse.png
>
>
Event display of an event with a single cosmic muon passing through the detector and depositing 1.23 TeV in one Tile Calorimeter cell. The green line shows a reconstructed muon track and muon segments. The yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the pink marker and the circle. The orange dotted line is the direction of Missing ET. The red dots show hits in the RPC and TGC Muon Triggers. The bottom figure is the same event display with pulse shape from Tile Calorimeter PMT's (2 upper figures) and Liquid Argon cells (2 lower figures).

90272_L1Calo_ev2006956_1.png90272_L1Calo_ev2006956_withPulse.png
 

Changed:
<
<
Event display of an air shower event. The green line shows muon segments. The yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the pink marker and the circle. The orange dotted line is the direction of Missing ET. The red dots show hits in the RPC and TGC Muon Triggers. The bottom figure is the same event display with pulse shape from Tile Calorimeter PMT's (3 upper figures) and Liquid Argon cells (the figure at the bottom).
Contact:Hideki.Okawa@cern.ch
Reference:
90272_L1Calo_ev4227806.png90272_L1Calo_ev4227806_withPulse.png
>
>
Event display of an air shower event. The green line shows muon segments. The yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the pink marker and the circle. The orange dotted line is the direction of Missing ET. The red dots show hits in the RPC and TGC Muon Triggers. The bottom figure is the same event display with pulse shape from Tile Calorimeter PMT's (3 upper figures) and Liquid Argon cells (the figure at the bottom).

90272_L1Calo_ev4227806.png90272_L1Calo_ev4227806_withPulse.png
 

Revision 232009-03-27 - HidekiOkawa

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META TOPICPARENT name="HidekiOkawa"

Preliminary Results from High Energetic Cosmic Rays in the Atlas Calorimeter

<!--optional-->
Line: 10 to 10
 energy spectra from the cosmic runs and to investigate the performance of the cleaning cuts against cosmic rays.

Cosmic data triggered by L1Calo were used for the studies. L1Calo triggers when there are large energy

Changed:
<
<
deposits in the calorimeter towers. Here, we used a specific run (90272) from September 2008. Officially reprocessed files were used for the analyses. Hot channels identified in the ATLAS database were masked during the reconstruction. For Liquid Argon (LAr) cells, such channels were corrected as having 0 MeV. No correction was made for other types of bad channels (ex. dead channels) for LAr. For Tile Calorimeter (TileCal), since each cell consists of 2 PMT's, when 1 PMT was identified as problematic, then only the remaining PMT was used and the cell energy was defined as 2x(1 PMT energy). If both PMT's were problematic, then those cells were regarded as having 1 MeV.
>
>
deposits in the calorimeter towers. Here, we used a specific run (90272) from September 2008. The data used in the analyses have been reprocessed in December 2008.
  Cosmic ray Monte Carlo samples were produced using the known cosmic muon flux at the ground level
Changed:
<
<
(A. Dar , Phys. Rev. Letters 51, 227 (1983) is used as the reference). The samples were produced in
>
>
(A. Dar , Phys. Rev. Letters 51, 227 (1983) is used as the reference). Only single muons are considered in the Monte Carlo simulation (no air showers). The samples were produced in
 4 slices considering the original muon momentum generated at the ground level (10-100 GeV, 100-300 GeV, 300 GeV-1 TeV, 1-5 TeV). These samples were later normalized according to the flux. The simulation takes into account the muon interactions through the rock and the ATLAS detector.
Line: 35 to 30
 
Changed:
<
<
Distribution of the scalar sum of all transverse energy measured in the calorimeter (Sum ET) from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo simulation. Only single muons are considered in the Monte Carlo (no air showers). The MET_Base algorithm (i.e. all cells with |E|>2 sigma are considered for the calculation) is used for the Sum ET calculation. Energy is at the EM scale. Monte Carlo distribution is normalized to data in 100-300 GeV range. Only events which have a jet with ET>20 GeV are included in the plot. Trigger effects are not considered in the simulation. The measured Sum ET distribution is well described by the simulation. At high ET, we also observed some air shower events, which are not included in the simulation.
Contact:Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
SumEt_Base_j20.png
>
>
Distribution of the scalar sum of the transverse energy in all cells measured in the calorimeter (Sum ET) from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo simulation. The MET_Base algorithm (i.e. all cells with |E|>2 sigma are considered for the calculation) is used for the Sum ET calculation. Energy is at the electromagnetic scale. Monte Carlo distribution is normalized to data in the 100-300 GeV range. Only events which have a jet with ET>20 GeV are included. Trigger effects are not considered in the simulation. The measured Sum ET distribution is well described by the simulation. At high ET, we also observed some air shower events, which are not included in the simulation.
Contact:Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
SumEt_Base_j20.png
 

Revision 222009-03-27 - HidekiOkawa

Line: 1 to 1
 
META TOPICPARENT name="HidekiOkawa"

Preliminary Results from High Energetic Cosmic Rays in the Atlas Calorimeter

<!--optional-->
Line: 43 to 43
 
Changed:
<
<
The jet EM fraction is the ratio of the energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. The jet EM fraction from the cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples are shown in the figure. Only single muons are considered in the Monte Carlo (no air showers). Only jets with ET>20 GeV were included in the figure. The distributions were normalized by the total number of jets (areas are 1). The most likely value for the EM fraction is 0 or 1 for fake jets from cosmics, since the high energy deposit from photons originated from high energetic muons will localize either in the EM or the hadronic calorimeter. The QCD jets have a broad distribution of EM fraction peaking around 0.8. Good separation between real QCD jets and fake jets from cosmics were observed. The EM fraction larger than 1 is possible, since noise clusters that can give negative energy contributions are included in jets. Selection cuts around 0 and 1 can remove most of the fake jets while keeping most of the jets produced in proton-proton collisions.
>
>
The jet EM fraction is the ratio of the energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. The jet EM fraction from the cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples are shown in the figure. Only single muons are considered in the Monte Carlo (no air showers). Only jets with ET>20 GeV were included in the figure. The distributions were normalized by the total number of jets (areas are 1). The most likely value for the EM fraction is 0 or 1 for fake jets from cosmics, since the high energy deposit from photons originated from high energetic muons will localize either in the EM or the hadronic calorimeter. The QCD jets have a broad distribution of EM fraction peaking around 0.8. EM fraction less than 0 or larger 1, is due to small negative energy contribution coming from noise. Good separation between real QCD jets and fake jets from cosmics were observed. The EM fraction larger than 1 is possible, since noise clusters that can give negative energy contributions are included in jets. Selection cuts around 0 and 1 can remove most of the fake jets while keeping most of the jets produced in proton-proton collisions.
 
Contact:Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEMF_TopoR4.png
Line: 55 to 55
 
Changed:
<
<
The distribution of jet transverse energy from cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only jets with ET>20 GeV were included in the figure. The blue points are from data, and the red solid lines are from the Monte Carlo. The blue square marks and the red solid distributions are before jet cleaning cuts. The blue circles and the red dotted lines show distributions after applying a cut on EM fraction (jets remain when 0.2 < EM fraction <0.97).
Contact:Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEt_TopoR4_Cleaning.png
>
>
The distribution of jet transverse energy from cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only jets with ET>20 GeV were included in the figure. The blue points are from data, and the red solid lines are from the Monte Carlo. The blue square marks and the red solid distributions are before jet cleaning cuts. The blue open circles and the red dotted lines show distributions after applying a cut on EM fraction (jets remain when 0.2 < EM fraction <0.97). The blue triangular marker and the red dash lines show distributions after applying the cut on EM fraction (0.2 < EM fraction <0.97) and the number of clusters (jets remain when number of clusters >=7). This is an example to show the performance of cleaning cuts.
Contact:Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEt_TopoR4_Cleaning.png
 

Revision 212009-03-26 - HidekiOkawa

Line: 1 to 1
 
META TOPICPARENT name="HidekiOkawa"

Preliminary Results from High Energetic Cosmic Rays in the Atlas Calorimeter

<!--optional-->
Line: 45 to 45
  The jet EM fraction is the ratio of the energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. The jet EM fraction from the cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples are shown in the figure. Only single muons are considered in the Monte Carlo (no air showers). Only jets with ET>20 GeV were included in the figure. The distributions were normalized by the total number of jets (areas are 1). The most likely value for the EM fraction is 0 or 1 for fake jets from cosmics, since the high energy deposit from photons originated from high energetic muons will localize either in the EM or the hadronic calorimeter. The QCD jets have a broad distribution of EM fraction peaking around 0.8. Good separation between real QCD jets and fake jets from cosmics were observed. The EM fraction larger than 1 is possible, since noise clusters that can give negative energy contributions are included in jets. Selection cuts around 0 and 1 can remove most of the fake jets while keeping most of the jets produced in proton-proton collisions.
Deleted:
<
<
  EMF > 0.2 0.2 < EMF < 0.97
Efficiency 99.5 % 89.7 %
Fake Rejection 92.5 % 97.5 %

 
Contact:Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007

JetEMF_TopoR4.png

The number of calorimeter clusters in jets from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). Topoclusters are used as the inputs to jets. Only jets with ET>20 GeV and |eta| < 3.2 were included in the figure, since the number of clusters do not have much fake rejection power in the forward region due to large granularity. Fake jets tend to have small numbers of clusters. Selection cuts around 6 can remove most of the fake jets while keeping most of the jets produced in proton-proton collisions.

Deleted:
<
<
  NCluster >= 6 NCluster >= 7
Efficiency 92.9 % 87.9 %
Fake Rejection 98.8 % 99.4 %
 
Contact:Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007

JetSize_TopoR4.png
Line: 95 to 87
  -- HidekiOkawa - 11 Mar 2009
Changed:
<
<
META FILEATTACHMENT attachment="JetEMF_TopoR4.png" attr="" comment="" date="1237386919" name="JetEMF_TopoR4.png" path="JetEMF_TopoR4.png" size="17508" stream="JetEMF_TopoR4.png" user="Main.HidekiOkawa" version="5"
META FILEATTACHMENT attachment="JetEt_TopoR4.png" attr="" comment="" date="1237386542" name="JetEt_TopoR4.png" path="JetEt_TopoR4.png" size="14777" stream="JetEt_TopoR4.png" user="Main.HidekiOkawa" version="7"
>
>
META FILEATTACHMENT attachment="JetEMF_TopoR4.png" attr="" comment="" date="1238097474" name="JetEMF_TopoR4.png" path="JetEMF_TopoR4.png" size="18007" stream="JetEMF_TopoR4.png" user="Main.HidekiOkawa" version="6"
META FILEATTACHMENT attachment="JetEt_TopoR4.png" attr="" comment="" date="1238096901" name="JetEt_TopoR4.png" path="JetEt_TopoR4.png" size="15255" stream="JetEt_TopoR4.png" user="Main.HidekiOkawa" version="8"
 
META FILEATTACHMENT attachment="SumEt_Base.png" attr="" comment="" date="1237296572" name="SumEt_Base.png" path="SumEt_Base.png" size="13323" stream="SumEt_Base.png" user="Main.HidekiOkawa" version="3"
META FILEATTACHMENT attachment="JetNTrk_TopoR4.png" attr="" comment="" date="1237387162" name="JetNTrk_TopoR4.png" path="JetNTrk_TopoR4.png" size="16604" stream="JetNTrk_TopoR4.png" user="Main.HidekiOkawa" version="4"
Changed:
<
<
META FILEATTACHMENT attachment="EvEMF_TopoR4.png" attr="" comment="" date="1237387853" name="EvEMF_TopoR4.png" path="EvEMF_TopoR4.png" size="17643" stream="EvEMF_TopoR4.png" user="Main.HidekiOkawa" version="3"
META FILEATTACHMENT attachment="JetEt_TopoR4_Cleaning.png" attr="" comment="" date="1237387647" name="JetEt_TopoR4_Cleaning.png" path="JetEt_TopoR4_Cleaning.png" size="17622" stream="JetEt_TopoR4_Cleaning.png" user="Main.HidekiOkawa" version="5"
>
>
META FILEATTACHMENT attachment="EvEMF_TopoR4.png" attr="" comment="" date="1238098784" name="EvEMF_TopoR4.png" path="EvEMF_TopoR4.png" size="18097" stream="EvEMF_TopoR4.png" user="Main.HidekiOkawa" version="4"
META FILEATTACHMENT attachment="JetEt_TopoR4_Cleaning.png" attr="" comment="" date="1238098586" name="JetEt_TopoR4_Cleaning.png" path="JetEt_TopoR4_Cleaning.png" size="19507" stream="JetEt_TopoR4_Cleaning.png" user="Main.HidekiOkawa" version="6"
 
META FILEATTACHMENT attachment="90272_L1Calo_ev1030029.png" attr="" comment="" date="1236979710" name="90272_L1Calo_ev1030029.png" path="90272_L1Calo_ev1030029.png" size="75315" stream="90272_L1Calo_ev1030029.png" user="Main.HidekiOkawa" version="2"
META FILEATTACHMENT attachment="90272_L1Calo_ev1030029_withPulse.png" attr="" comment="" date="1236979348" name="90272_L1Calo_ev1030029_withPulse.png" path="90272_L1Calo_ev1030029_withPulse.png" size="146681" stream="90272_L1Calo_ev1030029_withPulse.png" user="Main.HidekiOkawa" version="1"
Changed:
<
<
META FILEATTACHMENT attachment="JetSize_TopoR4.png" attr="" comment="" date="1237387389" name="JetSize_TopoR4.png" path="JetSize_TopoR4.png" size="18332" stream="JetSize_TopoR4.png" user="Main.HidekiOkawa" version="4"
>
>
META FILEATTACHMENT attachment="JetSize_TopoR4.png" attr="" comment="" date="1238097735" name="JetSize_TopoR4.png" path="JetSize_TopoR4.png" size="18717" stream="JetSize_TopoR4.png" user="Main.HidekiOkawa" version="5"
 
META FILEATTACHMENT attachment="90272_L1Calo_ev2006956_1.png" attr="" comment="" date="1237325271" name="90272_L1Calo_ev2006956_1.png" path="90272_L1Calo_ev2006956.png" size="59034" stream="90272_L1Calo_ev2006956.png" user="Main.HidekiOkawa" version="2"
META FILEATTACHMENT attachment="90272_L1Calo_ev2006956_withPulse.png" attr="" comment="" date="1237325300" name="90272_L1Calo_ev2006956_withPulse.png" path="90272_L1Calo_ev2006956_withPulse.png" size="144920" stream="90272_L1Calo_ev2006956_withPulse.png" user="Main.HidekiOkawa" version="2"
Changed:
<
<
META FILEATTACHMENT attachment="SumEt_Base_j20.png" attr="" comment="" date="1237386262" name="SumEt_Base_j20.png" path="SumEt_Base_j20.png" size="14148" stream="SumEt_Base_j20.png" user="Main.HidekiOkawa" version="3"
>
>
META FILEATTACHMENT attachment="SumEt_Base_j20.png" attr="" comment="" date="1238096556" name="SumEt_Base_j20.png" path="SumEt_Base_j20.png" size="14702" stream="SumEt_Base_j20.png" user="Main.HidekiOkawa" version="4"
 
META FILEATTACHMENT attachment="90272_L1Calo_ev4227806.png" attr="" comment="" date="1237324718" name="90272_L1Calo_ev4227806.png" path="90272_L1Calo_ev4227806.png" size="111578" stream="90272_L1Calo_ev4227806.png" user="Main.HidekiOkawa" version="1"
META FILEATTACHMENT attachment="90272_L1Calo_ev4227806_withPulse.png" attr="" comment="" date="1237324739" name="90272_L1Calo_ev4227806_withPulse.png" path="90272_L1Calo_ev4227806_withPulse.png" size="181929" stream="90272_L1Calo_ev4227806_withPulse.png" user="Main.HidekiOkawa" version="1"
META FILEATTACHMENT attachment="JetEtMiss_CosmicPlotsForApproval.pdf" attr="" comment="" date="1237499070" name="JetEtMiss_CosmicPlotsForApproval.pdf" path="JetEtMiss_CosmicPlotsForApproval.pdf" size="898970" stream="JetEtMiss_CosmicPlotsForApproval.pdf" user="Main.HidekiOkawa" version="1"
Added:
>
>
META FILEATTACHMENT attachment="SumEt_MCCompare_j20.eps" attr="" comment="" date="1238096466" name="SumEt_MCCompare_j20.eps" path="SumEt_MCCompare_j20.eps" size="15406" stream="SumEt_MCCompare_j20.eps" user="Main.HidekiOkawa" version="1"

Revision 202009-03-23 - HidekiOkawa

Line: 1 to 1
 
META TOPICPARENT name="HidekiOkawa"

Preliminary Results from High Energetic Cosmic Rays in the Atlas Calorimeter

<!--optional-->
Line: 6 to 6
 

Introduction

Jets and large missing ET can originate from high energy cosmic muons passing the ATLAS calorimeter.

Changed:
<
<
The main of the results is to demonstrate our understandings of the measured
>
>
The aim of the results is to demonstrate our understandings of the measured
 energy spectra from the cosmic runs and to investigate the performance of the cleaning cuts against cosmic rays.

Cosmic data triggered by L1Calo were used for the studies. L1Calo triggers when there are large energy

Line: 53 to 53
 
Deleted:
<
<
The number of associated tracks in jets from the cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). "TrackParticleCandidate" (tracks reconstructed from Inner Detectors) are considered. Tracks are defined as associated when they are within deltaR = 0.4 (the same as the jet cone size) from jets. Only jets with ET>20 GeV and |eta| < 2.5 were included in the figure, since tracks cannot be reconstructed at higher eta . The jets produced from cosmic muons tend to have a low multiplicity of associated tracks. Selection cuts around 1 or 2 can remove most of the fake jets while keeping most of the jets produced in proton-proton collisions.

  NTrack >= 2
Efficiency 99.7 %
Fake Rejection 98.8 %


Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007

JetNTrk_TopoR4.png
 The number of calorimeter clusters in jets from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). Topoclusters are used as the inputs to jets. Only jets with ET>20 GeV and |eta| < 3.2 were included in the figure, since the number of clusters do not have much fake rejection power in the forward region due to large granularity. Fake jets tend to have small numbers of clusters. Selection cuts around 6 can remove most of the fake jets while keeping most of the jets produced in proton-proton collisions.

  NCluster >= 6 NCluster >= 7
Line: 73 to 63
 
Changed:
<
<
The distribution of jet transverse energy from cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only jets with ET>20 GeV were included in the figure. The blue points are from data, and the red solid lines are from the Monte Carlo. The blue square marks and the red solid distributions are before jet cleaning cuts. The blue circles and the red dotted lines show distributions after applying a cut on EM fraction (jets remain when 0.2 < EM fraction <0.97). No jets remain after applying cuts with EM fraction, the number of associated jets (jets remain when number of tracks >=2), and the number of clusters in jets (jets remain when number of clusters >=7).
Contact:Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEt_TopoR4_Cleaning.png
>
>
The distribution of jet transverse energy from cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only jets with ET>20 GeV were included in the figure. The blue points are from data, and the red solid lines are from the Monte Carlo. The blue square marks and the red solid distributions are before jet cleaning cuts. The blue circles and the red dotted lines show distributions after applying a cut on EM fraction (jets remain when 0.2 < EM fraction <0.97).
Contact:Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEt_TopoR4_Cleaning.png
 

Revision 192009-03-20 - HidekiOkawa

Line: 1 to 1
 
META TOPICPARENT name="HidekiOkawa"
Changed:
<
<

Cosmic Plots For Approval

>
>

Preliminary Results from High Energetic Cosmic Rays in the Atlas Calorimeter

 
<!--optional-->

Introduction

Jets and large missing ET can originate from high energy cosmic muons passing the ATLAS calorimeter.

Changed:
<
<
The main aim of the plots shown below is to demonstrate our understandings of the measured
>
>
The main of the results is to demonstrate our understandings of the measured
 energy spectra from the cosmic runs and to investigate the performance of the cleaning cuts against cosmic rays.

Cosmic data triggered by L1Calo were used for the studies. L1Calo triggers when there are large energy

Line: 35 to 35
 
Changed:
<
<
Distribution of the scalar sum of all transverse energy measured in the calorimeter (Sum ET) from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo simulation. Only single muons are considered in the Monte Carlo (no air showers). The MET_Base algorithm (i.e. all cells with |E|>2 sigma are considered for the calculation) is used for the Sum ET calculation. Energy is at the EM scale. Monte Carlo distribution is normalized to data in 100-300 GeV range. Only events which have a jet with ET>20 GeV are included in the plot. Trigger effects are not considered in the simulation. The measured Sum ET disctribution is well described by the simulation. The excess at high Sum ET is due to air showers.
Contact:Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
SumEt_Base_j20.png
>
>
Distribution of the scalar sum of all transverse energy measured in the calorimeter (Sum ET) from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo simulation. Only single muons are considered in the Monte Carlo (no air showers). The MET_Base algorithm (i.e. all cells with |E|>2 sigma are considered for the calculation) is used for the Sum ET calculation. Energy is at the EM scale. Monte Carlo distribution is normalized to data in 100-300 GeV range. Only events which have a jet with ET>20 GeV are included in the plot. Trigger effects are not considered in the simulation. The measured Sum ET distribution is well described by the simulation. At high ET, we also observed some air shower events, which are not included in the simulation.
Contact:Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
SumEt_Base_j20.png
 
Changed:
<
<
Distribution of jet transverse energy from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only single muons are considered in the Monte Carlo (no air showers). The same normalization factor as for the figure above is applied. The ATLAS Cone Jet algorithm with a cone size 0.4 is used. Topoclusters are the inputs for the jet reconstruction. Only jets with ET>20 GeV were included in the figure. Jet energy is at the EM scale. The shape of the distribution is well described by the simulation. The excess at high Sum ET is due to air showers.
Contact:Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEt_TopoR4.png
>
>
Distribution of jet transverse energy from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only single muons are considered in the Monte Carlo (no air showers). The same normalization factor as for the figure above is applied. The ATLAS Cone Jet algorithm with a cone size 0.4 is used. Topoclusters are the inputs for the jet reconstruction. Only jets with ET>20 GeV were included in the figure. Jet energy is at the EM scale. The shape of the distribution is well described by the simulation. At high ET, we also observed some air shower events, which are not included in the simulation.
Contact:Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEt_TopoR4.png
 

Revision 182009-03-19 - HidekiOkawa

Line: 1 to 1
 
META TOPICPARENT name="HidekiOkawa"

Cosmic Plots For Approval

<!--optional-->
Line: 32 to 32
 
Deleted:
<
<
Distribution of the scalar sum of all transverse energy measured in the calorimeter (Sum ET) from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo simulation. Only single muons are considered in the Monte Carlo (no air showers). The MET_Base algorithm (i.e. all cells with |E|>2 sigma are considered for the calculation) is used for the Sum ET calculation. Energy is at the EM scale. Monte Carlo distribution is normalized to data in 100-300 GeV range. Only events which have a jet with ET>20 GeV are included in the plot. Trigger effects are not considered in the simulation. The measured Sum ET disctribution is well described by the simulation. The excess at high Sum ET is due to air showers.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
SumEt_Base_j20.png
 
Changed:
<
<
Distribution of jet transverse energy from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only single muons are considered in the Monte Carlo (no air showers). The same normalization factor as for the figure above is applied. The ATLAS Cone Jet algorithm with a cone size 0.4 is used. Topoclusters are the inputs for the jet reconstruction. Only jets with ET>20 GeV were included in the figure. Jet energy is at the EM scale. The shape of the distribution is well described by the simulation. The excess at high Sum ET is due to air showers.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEt_TopoR4.png
>
>
 
Changed:
<
<
The jet EM fraction is the ratio of the energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. The jet EM fraction from the cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples are shown in the figure. Only single muons are considered in the Monte Carlo (no air showers). Only jets with ET>20 GeV were included in the figure. The distributions were normalized by the total number of jets (areas are 1). The most likely value for the EM fraction is 0 or 1 for fake jets from cosmics, since the high energy deposit from photons originated from high energetic muons will localize either in the EM or the hadronic calorimeter. The QCD jets have a broad distribution of EM fraction peaking around 0.8. Good separation between real QCD jets and fake jets from cosmics were observed. The EM fraction larger than 1 is possible, since noise clusters that can give negative energy contributions are included in jets. Selection cuts around 0 and 1 can remove most of the fake jets while keeping most of the jets produced in proton-proton collisions.
>
>
Distribution of the scalar sum of all transverse energy measured in the calorimeter (Sum ET) from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo simulation. Only single muons are considered in the Monte Carlo (no air showers). The MET_Base algorithm (i.e. all cells with |E|>2 sigma are considered for the calculation) is used for the Sum ET calculation. Energy is at the EM scale. Monte Carlo distribution is normalized to data in 100-300 GeV range. Only events which have a jet with ET>20 GeV are included in the plot. Trigger effects are not considered in the simulation. The measured Sum ET disctribution is well described by the simulation. The excess at high Sum ET is due to air showers.
Contact:Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007

SumEt_Base_j20.png

Distribution of jet transverse energy from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only single muons are considered in the Monte Carlo (no air showers). The same normalization factor as for the figure above is applied. The ATLAS Cone Jet algorithm with a cone size 0.4 is used. Topoclusters are the inputs for the jet reconstruction. Only jets with ET>20 GeV were included in the figure. Jet energy is at the EM scale. The shape of the distribution is well described by the simulation. The excess at high Sum ET is due to air showers.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007

JetEt_TopoR4.png

The jet EM fraction is the ratio of the energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. The jet EM fraction from the cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples are shown in the figure. Only single muons are considered in the Monte Carlo (no air showers). Only jets with ET>20 GeV were included in the figure. The distributions were normalized by the total number of jets (areas are 1). The most likely value for the EM fraction is 0 or 1 for fake jets from cosmics, since the high energy deposit from photons originated from high energetic muons will localize either in the EM or the hadronic calorimeter. The QCD jets have a broad distribution of EM fraction peaking around 0.8. Good separation between real QCD jets and fake jets from cosmics were observed. The EM fraction larger than 1 is possible, since noise clusters that can give negative energy contributions are included in jets. Selection cuts around 0 and 1 can remove most of the fake jets while keeping most of the jets produced in proton-proton collisions.

 
  EMF > 0.2 0.2 < EMF < 0.97
Efficiency 99.5 % 89.7 %
Line: 44 to 51
 
Contact:Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEMF_TopoR4.png
Changed:
<
<
The number of associated tracks in jets from the cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). "TrackParticleCandidate" (tracks reconstructed from Inner Detectors) are considered. Tracks are defined as associated when they are within deltaR = 0.4 (the same as the jet cone size) from jets. Only jets with ET>20 GeV and |eta| < 2.5 were included in the figure, since tracks cannot be reconstructed at higher eta . The jets produced from cosmic muons tend to have a low multiplicity of associated tracks. Selection cuts around 1 or 2 can remove most of the fake jets while keeping most of the jets produced in proton-proton collisions.
>
>
 
Changed:
<
<
  NTrack >= 3
Efficiency 98.2 %
Fake Rejection 99.6 %
>
>
The number of associated tracks in jets from the cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). "TrackParticleCandidate" (tracks reconstructed from Inner Detectors) are considered. Tracks are defined as associated when they are within deltaR = 0.4 (the same as the jet cone size) from jets. Only jets with ET>20 GeV and |eta| < 2.5 were included in the figure, since tracks cannot be reconstructed at higher eta . The jets produced from cosmic muons tend to have a low multiplicity of associated tracks. Selection cuts around 1 or 2 can remove most of the fake jets while keeping most of the jets produced in proton-proton collisions.

  NTrack >= 2
Efficiency 99.7 %
Fake Rejection 98.8 %
 
Contact:Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetNTrk_TopoR4.png
Changed:
<
<
The number of calorimeter clusters in jets from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). Topoclusters are used as the inputs to jets. Only jets with ET>20 GeV and |eta| < 3.2 were included in the figure, since the number of clusters do not have much fake rejection power in the forward region due to large granularity. Fake jets tend to have small numbers of clusters. Selection cuts around 6 can remove most of the fake jets while keeping most of the jets produced in proton-proton collisions.
>
>

The number of calorimeter clusters in jets from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). Topoclusters are used as the inputs to jets. Only jets with ET>20 GeV and |eta| < 3.2 were included in the figure, since the number of clusters do not have much fake rejection power in the forward region due to large granularity. Fake jets tend to have small numbers of clusters. Selection cuts around 6 can remove most of the fake jets while keeping most of the jets produced in proton-proton collisions.

 
Changed:
<
<
  NCluster >= 6
Efficiency 92.9 %
Fake Rejection 98.7 %
>
>
  NCluster >= 6 NCluster >= 7
Efficiency 92.9 % 87.9 %
Fake Rejection 98.8 % 99.4 %
 
Contact:Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetSize_TopoR4.png
Changed:
<
<
The distribution of jet transverse energy from cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only jets with ET>20 GeV were included in the figure. The blue points are from data, and the red solid lines are from the Monte Carlo. The blue square marks and the red solid distributions are before jet cleaning cuts. The blue circles and the red dotted lines show distributions after applying a cut on EM fraction (jets remain when 0.2 < EM fraction <0.97). No jets remain after applying cuts with EM fraction, the number of associated jets (jets remain when number of tracks >=2), and the number of clusters in jets (jets remain when number of clusters >=7).
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEt_TopoR4_Cleaning.png
>
>

The distribution of jet transverse energy from cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only jets with ET>20 GeV were included in the figure. The blue points are from data, and the red solid lines are from the Monte Carlo. The blue square marks and the red solid distributions are before jet cleaning cuts. The blue circles and the red dotted lines show distributions after applying a cut on EM fraction (jets remain when 0.2 < EM fraction <0.97). No jets remain after applying cuts with EM fraction, the number of associated jets (jets remain when number of tracks >=2), and the number of clusters in jets (jets remain when number of clusters >=7).
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007

JetEt_TopoR4_Cleaning.png
 
Changed:
<
<
The Event EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. The Event EM fraction is defined for each event as a jet ET weighted-average of the jet EM fraction. Jets with ET>7 GeV are considered. Good separation between real QCD jets and fake jets from cosmics were observed. Event EM fraction is a promising observable to remove events with fake missing ET.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
EvEMF_TopoR4.png
>
>

The Event EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. The Event EM fraction is defined for each event as a jet ET weighted-average of the jet EM fraction. Jets with ET>7 GeV are considered. Good separation between real QCD jets and fake jets from cosmics were observed. Event EM fraction is a promising observable to remove events with fake missing ET.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007

EvEMF_TopoR4.png
 
Line: 70 to 87
 
Changed:
<
<
Event display of an event with a single cosmic muon passing through the detector and depositing 1.23 TeV in 1 Tile Calorimeter cell. The green line shows a reconstructed muon track and muon segments. The yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the pink marker and the circle. The orange dotted line is the direction of Missing ET. The red dots show hits in the RPC and TGC Muon Triggers. The bottom figure is the same event display with pulse shape from Tile Calorimeter PMT's (2 upper figures) and Liquid Argon cells (2 lower figures).
Contact: Hideki.Okawa@cern.ch
Reference:
90272_L1Calo_ev2006956_1.png90272_L1Calo_ev2006956_withPulse.png
>
>

Event display of an event with a single cosmic muon passing through the detector and depositing 1.23 TeV in 1 Tile Calorimeter cell. The green line shows a reconstructed muon track and muon segments. The yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the pink marker and the circle. The orange dotted line is the direction of Missing ET. The red dots show hits in the RPC and TGC Muon Triggers. The bottom figure is the same event display with pulse shape from Tile Calorimeter PMT's (2 upper figures) and Liquid Argon cells (2 lower figures).
Contact: Hideki.Okawa@cern.ch
Reference:

90272_L1Calo_ev2006956_1.png90272_L1Calo_ev2006956_withPulse.png
 
Changed:
<
<
Event display of an air shower event. The green line shows muon segments. The yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the pink marker and the circle. The orange dotted line is the direction of Missing ET. The red dots show hits in the RPC and TGC Muon Triggers. The bottom figure is the same event display with pulse shape from Tile Calorimeter PMT's (3 upper figures) and Liquid Argon cells (the figure at the bottom).
Contact: Hideki.Okawa@cern.ch
Reference:
90272_L1Calo_ev4227806.png90272_L1Calo_ev4227806_withPulse.png
>
>
Event display of an air shower event. The green line shows muon segments. The yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the pink marker and the circle. The orange dotted line is the direction of Missing ET. The red dots show hits in the RPC and TGC Muon Triggers. The bottom figure is the same event display with pulse shape from Tile Calorimeter PMT's (3 upper figures) and Liquid Argon cells (the figure at the bottom).
Contact:Hideki.Okawa@cern.ch
Reference:
90272_L1Calo_ev4227806.png90272_L1Calo_ev4227806_withPulse.png
 
Line: 96 to 119
 
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META FILEATTACHMENT attachment="90272_L1Calo_ev4227806.png" attr="" comment="" date="1237324718" name="90272_L1Calo_ev4227806.png" path="90272_L1Calo_ev4227806.png" size="111578" stream="90272_L1Calo_ev4227806.png" user="Main.HidekiOkawa" version="1"
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META FILEATTACHMENT attachment="JetEtMiss_CosmicPlotsForApproval.pdf" attr="" comment="" date="1237499070" name="JetEtMiss_CosmicPlotsForApproval.pdf" path="JetEtMiss_CosmicPlotsForApproval.pdf" size="898970" stream="JetEtMiss_CosmicPlotsForApproval.pdf" user="Main.HidekiOkawa" version="1"

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The jet EM fraction is the ratio of the energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. The jet EM fraction from the cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples are shown in the figure. Only single muons are considered in the Monte Carlo (no air showers). Only jets with ET>20 GeV were included in the figure. The distributions were normalized by the total number of jets (areas are 1). The most likely value for the EM fraction is 0 or 1 for fake jets from cosmics, since the high energy deposit from photons originated from high energetic muons will localize either in the EM or the hadronic calorimeter. The QCD jets have a broad distribution of EM fraction peaking around 0.8. Good separation between real QCD jets and fake jets from cosmics were observed. The EM fraction larger than 1 is possible, since noise clusters that can give negative energy contributions are included in jets. Selection cuts around 0 and 1 can remove most of the fake jets while keeping most of the jets produced in proton-proton collisions.

  EMF > 0.2 0.2 < EMF < 0.97
Changed:
<
<
Efficiency 99.97 % 89.67 %
Fake Rejection 92.6 % 97.2 %
>
>
Efficiency 99.5 % 89.7 %
Fake Rejection 92.5 % 97.5 %
 
Contact:Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEMF_TopoR4.png

Revision 162009-03-19 - HidekiOkawa

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META TOPICPARENT name="HidekiOkawa"

Cosmic Plots For Approval

<!--optional-->

Introduction

Changed:
<
<
Jets and large Missing ET can originate from high energy cosmic muons passing the ATLAS calorimeter.
>
>
Jets and large missing ET can originate from high energy cosmic muons passing the ATLAS calorimeter.
 The main aim of the plots shown below is to demonstrate our understandings of the measured
Changed:
<
<
energy spectra from the cosmic runs and to show the validity of the cleaning cuts against cosmic rays.
>
>
energy spectra from the cosmic runs and to investigate the performance of the cleaning cuts against cosmic rays.
 
Changed:
<
<
Cosmic data triggered by L1Calo were used in the plots. L1Calo triggers when there are large energy
>
>
Cosmic data triggered by L1Calo were used for the studies. L1Calo triggers when there are large energy
 deposits in the calorimeter towers. Here, we used a specific run (90272) from September 2008. Officially reprocessed files were used for the analyses. Hot channels identified in the ATLAS database were masked during the reconstruction. For Liquid Argon (LAr) cells, such channels were corrected as having 0 MeV. No
Line: 21 to 21
  Cosmic ray Monte Carlo samples were produced using the known cosmic muon flux at the ground level (A. Dar , Phys. Rev. Letters 51, 227 (1983) is used as the reference). The samples were produced in
Changed:
<
<
4 slices in regards to the original muon momentum generated at the ground level (10-100 GeV, 100_300 GeV, 300 GeV-1 TeV, 1-5 TeV). These samples were later normalized by considering the flux.
>
>
4 slices considering the original muon momentum generated at the ground level (10-100 GeV, 100-300 GeV, 300 GeV-1 TeV, 1-5 TeV). These samples were later normalized according to the flux.
 The simulation takes into account the muon interactions through the rock and the ATLAS detector. The triggers were not considered in the simulation.
Line: 31 to 31
 

Changed:
<
<
Distribution of the scalar sum of all transverse energy measured in the calorimeter (Sum ET) from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only single muons are considered in the Monte Carlo (no air showers). The MET_Base algorithm (i.e. all cells with |E|>2 sigma are considered for the calculation) is used for the Sum ET calculation. Energy is at the EM scale. Monte Carlo distribution is normalized to data in 100-300 GeV range. Only events which have a jet with ET>20 GeV are included in the plot. Trigger effects are not considered in the simulation.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
SumEt_Base_j20.png
>
>
Distribution of the scalar sum of all transverse energy measured in the calorimeter (Sum ET) from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo simulation. Only single muons are considered in the Monte Carlo (no air showers). The MET_Base algorithm (i.e. all cells with |E|>2 sigma are considered for the calculation) is used for the Sum ET calculation. Energy is at the EM scale. Monte Carlo distribution is normalized to data in 100-300 GeV range. Only events which have a jet with ET>20 GeV are included in the plot. Trigger effects are not considered in the simulation. The measured Sum ET disctribution is well described by the simulation. The excess at high Sum ET is due to air showers.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
SumEt_Base_j20.png
 
Changed:
<
<
Distribution of jet transverse energy from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only single muons are considered in the Monte Carlo (no air showers). The same normalization factor as for the figure above is applied. ATLAS Cone Jet algorithm with cone size 0.4 is used. Topoclusters are the inputs for the jet reconstruction. Only jets with ET>20 GeV were included in the figure. Jet energy is at the EM scale.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEt_TopoR4.png
>
>
Distribution of jet transverse energy from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only single muons are considered in the Monte Carlo (no air showers). The same normalization factor as for the figure above is applied. The ATLAS Cone Jet algorithm with a cone size 0.4 is used. Topoclusters are the inputs for the jet reconstruction. Only jets with ET>20 GeV were included in the figure. Jet energy is at the EM scale. The shape of the distribution is well described by the simulation. The excess at high Sum ET is due to air showers.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEt_TopoR4.png
 
Changed:
<
<
Jet EM fraction from the cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). Jet EM fraction is the ratio of the energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. Only jets with ET>20 GeV were included in the figure. The distributions were normalized by the entries (areas are 1). The most likely value for the EM fraction is 0 or 1 for fake jets from cosmics, since the high energy deposit from photons originated from high energetic muons will localize either in the EM or the hadronic calorimeter. The QCD jets have a broad distribution of EM fraction peaking around 0.8. Good separation between real QCD jets and fake jets from cosmics were observed. The EM fraction larger than 1 is possible when noise clusters that can give negative energy contributions are included in jets. Selection cuts around 0 and 1 can remove most of the fake jets while keeping most of the jets produced in proton-proton collisions.
>
>
The jet EM fraction is the ratio of the energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. The jet EM fraction from the cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples are shown in the figure. Only single muons are considered in the Monte Carlo (no air showers). Only jets with ET>20 GeV were included in the figure. The distributions were normalized by the total number of jets (areas are 1). The most likely value for the EM fraction is 0 or 1 for fake jets from cosmics, since the high energy deposit from photons originated from high energetic muons will localize either in the EM or the hadronic calorimeter. The QCD jets have a broad distribution of EM fraction peaking around 0.8. Good separation between real QCD jets and fake jets from cosmics were observed. The EM fraction larger than 1 is possible, since noise clusters that can give negative energy contributions are included in jets. Selection cuts around 0 and 1 can remove most of the fake jets while keeping most of the jets produced in proton-proton collisions.
 
  EMF > 0.2 0.2 < EMF < 0.97
Efficiency 99.97 % 89.67 %
Line: 43 to 43
 
Contact:Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEMF_TopoR4.png
Changed:
<
<
The number of associated tracks in jets from the cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). "TrackParticleCandidate" (tracks reconstructed from Inner Detectors) are considered. Tracks are defined as associated when they are within deltaR = 0.4 (the same as the jet cone size) from jets. Only jets with ET>20 GeV and |eta| < 2.5 were included in the figure, since tracks cannot be reconstructed in higher eta . The jets fakely produced from cosmic muons tend to have low multiplicity of associated tracks. Selection cuts around 1 or 2 can remove most of the fake jets while keeping most of the jets produced in proton-proton collisions.
>
>
The number of associated tracks in jets from the cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). "TrackParticleCandidate" (tracks reconstructed from Inner Detectors) are considered. Tracks are defined as associated when they are within deltaR = 0.4 (the same as the jet cone size) from jets. Only jets with ET>20 GeV and |eta| < 2.5 were included in the figure, since tracks cannot be reconstructed at higher eta . The jets produced from cosmic muons tend to have a low multiplicity of associated tracks. Selection cuts around 1 or 2 can remove most of the fake jets while keeping most of the jets produced in proton-proton collisions.
 
  NTrack >= 3
Efficiency 98.2 %

Revision 152009-03-18 - HidekiOkawa

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  -- HidekiOkawa - 11 Mar 2009
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META FILEATTACHMENT attachment="JetEMF_TopoR4.png" attr="" comment="" date="1237317961" name="JetEMF_TopoR4.png" path="JetEMF_TopoR4.png" size="16259" stream="JetEMF_TopoR4.png" user="Main.HidekiOkawa" version="4"
META FILEATTACHMENT attachment="JetEt_TopoR4.png" attr="" comment="" date="1237320017" name="JetEt_TopoR4.png" path="JetEt_TopoR4.png" size="13754" stream="JetEt_TopoR4.png" user="Main.HidekiOkawa" version="6"
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META FILEATTACHMENT attachment="JetEMF_TopoR4.png" attr="" comment="" date="1237386919" name="JetEMF_TopoR4.png" path="JetEMF_TopoR4.png" size="17508" stream="JetEMF_TopoR4.png" user="Main.HidekiOkawa" version="5"
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META FILEATTACHMENT attachment="JetNTrk_TopoR4.png" attr="" comment="" date="1237318347" name="JetNTrk_TopoR4.png" path="JetNTrk_TopoR4.png" size="15357" stream="JetNTrk_TopoR4.png" user="Main.HidekiOkawa" version="3"
META FILEATTACHMENT attachment="EvEMF_TopoR4.png" attr="" comment="" date="1237318838" name="EvEMF_TopoR4.png" path="EvEMF_TopoR4.png" size="16582" stream="EvEMF_TopoR4.png" user="Main.HidekiOkawa" version="2"
META FILEATTACHMENT attachment="JetEt_TopoR4_Cleaning.png" attr="" comment="" date="1237319847" name="JetEt_TopoR4_Cleaning.png" path="JetEt_TopoR4_Cleaning.png" size="16619" stream="JetEt_TopoR4_Cleaning.png" user="Main.HidekiOkawa" version="4"
>
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META FILEATTACHMENT attachment="JetNTrk_TopoR4.png" attr="" comment="" date="1237387162" name="JetNTrk_TopoR4.png" path="JetNTrk_TopoR4.png" size="16604" stream="JetNTrk_TopoR4.png" user="Main.HidekiOkawa" version="4"
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META FILEATTACHMENT attachment="90272_L1Calo_ev1030029.png" attr="" comment="" date="1236979710" name="90272_L1Calo_ev1030029.png" path="90272_L1Calo_ev1030029.png" size="75315" stream="90272_L1Calo_ev1030029.png" user="Main.HidekiOkawa" version="2"
META FILEATTACHMENT attachment="90272_L1Calo_ev1030029_withPulse.png" attr="" comment="" date="1236979348" name="90272_L1Calo_ev1030029_withPulse.png" path="90272_L1Calo_ev1030029_withPulse.png" size="146681" stream="90272_L1Calo_ev1030029_withPulse.png" user="Main.HidekiOkawa" version="1"
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META FILEATTACHMENT attachment="JetSize_TopoR4.png" attr="" comment="" date="1237318594" name="JetSize_TopoR4.png" path="JetSize_TopoR4.png" size="17056" stream="JetSize_TopoR4.png" user="Main.HidekiOkawa" version="3"
>
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META FILEATTACHMENT attachment="JetSize_TopoR4.png" attr="" comment="" date="1237387389" name="JetSize_TopoR4.png" path="JetSize_TopoR4.png" size="18332" stream="JetSize_TopoR4.png" user="Main.HidekiOkawa" version="4"
 
META FILEATTACHMENT attachment="90272_L1Calo_ev2006956_1.png" attr="" comment="" date="1237325271" name="90272_L1Calo_ev2006956_1.png" path="90272_L1Calo_ev2006956.png" size="59034" stream="90272_L1Calo_ev2006956.png" user="Main.HidekiOkawa" version="2"
META FILEATTACHMENT attachment="90272_L1Calo_ev2006956_withPulse.png" attr="" comment="" date="1237325300" name="90272_L1Calo_ev2006956_withPulse.png" path="90272_L1Calo_ev2006956_withPulse.png" size="144920" stream="90272_L1Calo_ev2006956_withPulse.png" user="Main.HidekiOkawa" version="2"
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META FILEATTACHMENT attachment="SumEt_Base_j20.png" attr="" comment="" date="1237319989" name="SumEt_Base_j20.png" path="SumEt_Base_j20.png" size="13232" stream="SumEt_Base_j20.png" user="Main.HidekiOkawa" version="2"
>
>
META FILEATTACHMENT attachment="SumEt_Base_j20.png" attr="" comment="" date="1237386262" name="SumEt_Base_j20.png" path="SumEt_Base_j20.png" size="14148" stream="SumEt_Base_j20.png" user="Main.HidekiOkawa" version="3"
 
META FILEATTACHMENT attachment="90272_L1Calo_ev4227806.png" attr="" comment="" date="1237324718" name="90272_L1Calo_ev4227806.png" path="90272_L1Calo_ev4227806.png" size="111578" stream="90272_L1Calo_ev4227806.png" user="Main.HidekiOkawa" version="1"
META FILEATTACHMENT attachment="90272_L1Calo_ev4227806_withPulse.png" attr="" comment="" date="1237324739" name="90272_L1Calo_ev4227806_withPulse.png" path="90272_L1Calo_ev4227806_withPulse.png" size="181929" stream="90272_L1Calo_ev4227806_withPulse.png" user="Main.HidekiOkawa" version="1"

Revision 142009-03-17 - HidekiOkawa

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Added:
>
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Introduction

Jets and large Missing ET can originate from high energy cosmic muons passing the ATLAS calorimeter. The main aim of the plots shown below is to demonstrate our understandings of the measured energy spectra from the cosmic runs and to show the validity of the cleaning cuts against cosmic rays.

Cosmic data triggered by L1Calo were used in the plots. L1Calo triggers when there are large energy deposits in the calorimeter towers. Here, we used a specific run (90272) from September 2008. Officially reprocessed files were used for the analyses. Hot channels identified in the ATLAS database were masked during the reconstruction. For Liquid Argon (LAr) cells, such channels were corrected as having 0 MeV. No correction was made for other types of bad channels (ex. dead channels) for LAr. For Tile Calorimeter (TileCal), since each cell consists of 2 PMT's, when 1 PMT was identified as problematic, then only the remaining PMT was used and the cell energy was defined as 2x(1 PMT energy). If both PMT's were problematic, then those cells were regarded as having 1 MeV.

Cosmic ray Monte Carlo samples were produced using the known cosmic muon flux at the ground level (A. Dar , Phys. Rev. Letters 51, 227 (1983) is used as the reference). The samples were produced in 4 slices in regards to the original muon momentum generated at the ground level (10-100 GeV, 100_300 GeV, 300 GeV-1 TeV, 1-5 TeV). These samples were later normalized by considering the flux. The simulation takes into account the muon interactions through the rock and the ATLAS detector. The triggers were not considered in the simulation.

 

Jets/Missing Et from Cosmic Runs

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This figure shows the distribution of Sum ET from cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only single muons are considered in the Monte Carlo (no air showers). MET_Base algorithm (cells with |E|>2 sigma are considered for the calculation) is used for the Sum ET calculation. Monte Carlo distribution is normalized to data in 100-300 GeV range. The discrepancy in the first bin is due to the fact that trigger effects are not considered in the cosmic Monte Carlo.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
SumEt_Base_j20.png
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Distribution of the scalar sum of all transverse energy measured in the calorimeter (Sum ET) from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only single muons are considered in the Monte Carlo (no air showers). The MET_Base algorithm (i.e. all cells with |E|>2 sigma are considered for the calculation) is used for the Sum ET calculation. Energy is at the EM scale. Monte Carlo distribution is normalized to data in 100-300 GeV range. Only events which have a jet with ET>20 GeV are included in the plot. Trigger effects are not considered in the simulation.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
SumEt_Base_j20.png
Distribution of jet transverse energy from the cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only single muons are considered in the Monte Carlo (no air showers). The same normalization factor as for the figure above is applied. ATLAS Cone Jet algorithm with cone size 0.4 is used. Topoclusters are the inputs for the jet reconstruction. Only jets with ET>20 GeV were included in the figure. Jet energy is at the EM scale.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEt_TopoR4.png
Jet EM fraction from the cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). Jet EM fraction is the ratio of the energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. Only jets with ET>20 GeV were included in the figure. The distributions were normalized by the entries (areas are 1). The most likely value for the EM fraction is 0 or 1 for fake jets from cosmics, since the high energy deposit from photons originated from high energetic muons will localize either in the EM or the hadronic calorimeter. The QCD jets have a broad distribution of EM fraction peaking around 0.8. Good separation between real QCD jets and fake jets from cosmics were observed. The EM fraction larger than 1 is possible when noise clusters that can give negative energy contributions are included in jets. Selection cuts around 0 and 1 can remove most of the fake jets while keeping most of the jets produced in proton-proton collisions.
 
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This figure shows the distribution of jet transverse energy from cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only single muons are considered in the Monte Carlo (no air showers). The same normalization factor as the figure above is applied. ATLAS Cone Jet algorithm with cone size 0.4 is used. Topoclusters are the inputs for jet reconstruction. Jet energy is at the EM scale.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEt_TopoR4.png
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  EMF > 0.2 0.2 < EMF < 0.97
Efficiency 99.97 % 89.67 %
Fake Rejection 92.6 % 97.2 %
 
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This figure shows the jet EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). Jet EM fraction is a ratio of energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. The distributions were normalized by the entries (areas are 1). EM fraction tends to concentrate around 0 or 1 for fake jets from cosmics, whereas QCD jets have a broad distribution of EM fraction peaking around 0.8. Good separation between real QCD jets and fake jets from cosmics were observed.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEMF_TopoR4.png
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Contact:Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEMF_TopoR4.png
 
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This figure shows the number of associated tracks in jets from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). "TrackParticleCandidate" (tracks reconstructed from Inner Detectors) are considered. Tracks are defined as associated when they are within deltaR = 0.4 (cone size) from jets. Fake jets tend to have low multiplicity of associated tracks. Good separation between real QCD jets and fake jets from cosmics were observed.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetNTrk_TopoR4.png
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The number of associated tracks in jets from the cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). "TrackParticleCandidate" (tracks reconstructed from Inner Detectors) are considered. Tracks are defined as associated when they are within deltaR = 0.4 (the same as the jet cone size) from jets. Only jets with ET>20 GeV and |eta| < 2.5 were included in the figure, since tracks cannot be reconstructed in higher eta . The jets fakely produced from cosmic muons tend to have low multiplicity of associated tracks. Selection cuts around 1 or 2 can remove most of the fake jets while keeping most of the jets produced in proton-proton collisions.
 
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This figure shows the jet size (number of clusters in jets) from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). Topoclusters are used for the input to jets, so jet size indicates the number of Topoclusters in jets. Fake jets tend to have low jet size. Good separation between real QCD jets and fake jets from cosmics were observed.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetSize_TopoR4.png
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  NTrack >= 3
Efficiency 98.2 %
Fake Rejection 99.6 %
 
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This figure shows the distribution of jet transverse energy from cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. The points are from data, and solid lines are from the Monte Carlo. Black distributions are before jet cleaning cuts. Red shows distributions after applying a cut on EM fraction (jets remain when 0.15 < EM fraction <0.97). No jets remain after applying cuts with EM fraction, the number of associated jets, and the number of clusters in jets.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEt_TopoR4_Cleaning.png
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Contact:Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetNTrk_TopoR4.png
 
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This figure shows the Event EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. The Event EM fraction is defined for each event as a weighted-average of jet EM fraction by jet ET. Jets with ET>7 GeV are considered. Good separation between real QCD jets and fake jets from cosmics were observed. Event EM fraction is a good candidate for "Missing ET cleaning."
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
EvEMF_TopoR4.png
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The number of calorimeter clusters in jets from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). Topoclusters are used as the inputs to jets. Only jets with ET>20 GeV and |eta| < 3.2 were included in the figure, since the number of clusters do not have much fake rejection power in the forward region due to large granularity. Fake jets tend to have small numbers of clusters. Selection cuts around 6 can remove most of the fake jets while keeping most of the jets produced in proton-proton collisions.

  NCluster >= 6
Efficiency 92.9 %
Fake Rejection 98.7 %


Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007

JetSize_TopoR4.png
The distribution of jet transverse energy from cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only jets with ET>20 GeV were included in the figure. The blue points are from data, and the red solid lines are from the Monte Carlo. The blue square marks and the red solid distributions are before jet cleaning cuts. The blue circles and the red dotted lines show distributions after applying a cut on EM fraction (jets remain when 0.2 < EM fraction <0.97). No jets remain after applying cuts with EM fraction, the number of associated jets (jets remain when number of tracks >=2), and the number of clusters in jets (jets remain when number of clusters >=7).
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEt_TopoR4_Cleaning.png
The Event EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. The Event EM fraction is defined for each event as a jet ET weighted-average of the jet EM fraction. Jets with ET>7 GeV are considered. Good separation between real QCD jets and fake jets from cosmics were observed. Event EM fraction is a promising observable to remove events with fake missing ET.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
EvEMF_TopoR4.png
 
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This event display shows an event with single cosmic muon passing by the detector and depositing 1.23 TeV in 1 Tile Calorimeter cell. Green line shows muon segments. Yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the pink marker and circle in the eta-phi plot. The red dotted line is the direction of Missing ET. The bottom figure is the same event display with pulse shape from Tile Calorimeter PMT's (2 upper figures) and Liquid Argon (2 lower figures).
Contact: Hideki.Okawa@cern.ch
Reference:
90272_L1Calo_ev2006956_1.png90272_L1Calo_ev2006956_withPulse.png
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Event display of an event with a single cosmic muon passing through the detector and depositing 1.23 TeV in 1 Tile Calorimeter cell. The green line shows a reconstructed muon track and muon segments. The yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the pink marker and the circle. The orange dotted line is the direction of Missing ET. The red dots show hits in the RPC and TGC Muon Triggers. The bottom figure is the same event display with pulse shape from Tile Calorimeter PMT's (2 upper figures) and Liquid Argon cells (2 lower figures).
Contact: Hideki.Okawa@cern.ch
Reference:
90272_L1Calo_ev2006956_1.png90272_L1Calo_ev2006956_withPulse.png
Event display of an air shower event. The green line shows muon segments. The yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the pink marker and the circle. The orange dotted line is the direction of Missing ET. The red dots show hits in the RPC and TGC Muon Triggers. The bottom figure is the same event display with pulse shape from Tile Calorimeter PMT's (3 upper figures) and Liquid Argon cells (the figure at the bottom).
Contact: Hideki.Okawa@cern.ch
Reference:
90272_L1Calo_ev4227806.png90272_L1Calo_ev4227806_withPulse.png
 
Line: 37 to 81
  -- HidekiOkawa - 11 Mar 2009
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Revision 132009-03-17 - HidekiOkawa

Line: 1 to 1
 
META TOPICPARENT name="HidekiOkawa"

Cosmic Plots For Approval

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Line: 7 to 7
 

Changed:
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This figure shows the distribution of Sum ET from cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only single muons are considered in the Monte Carlo (no air showers). MET_Base algorithm (cells with |E|>2 sigma are considered for the calculation) is used for the Sum ET calculation. Monte Carlo distribution is normalized to data in 100-300 GeV range. The discrepancy in the first bin is due to the fact that trigger effects are not considered in the cosmic Monte Carlo.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
SumEt_Base.png
>
>
This figure shows the distribution of Sum ET from cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only single muons are considered in the Monte Carlo (no air showers). MET_Base algorithm (cells with |E|>2 sigma are considered for the calculation) is used for the Sum ET calculation. Monte Carlo distribution is normalized to data in 100-300 GeV range. The discrepancy in the first bin is due to the fact that trigger effects are not considered in the cosmic Monte Carlo.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
SumEt_Base_j20.png
 
This figure shows the distribution of jet transverse energy from cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only single muons are considered in the Monte Carlo (no air showers). The same normalization factor as the figure above is applied. ATLAS Cone Jet algorithm with cone size 0.4 is used. Topoclusters are the inputs for jet reconstruction. Jet energy is at the EM scale.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEt_TopoR4.png
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Revision 122009-03-17 - HidekiOkawa

Line: 1 to 1
 
META TOPICPARENT name="HidekiOkawa"

Cosmic Plots For Approval

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This figure shows the distribution of jet transverse energy from cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only single muons are considered in the Monte Carlo (no air showers). The same normalization factor as the figure above is applied. ATLAS Cone Jet algorithm with cone size 0.4 is used. Topoclusters are the inputs for jet reconstruction. Jet energy is at the EM scale.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEt_TopoR4.png
Deleted:
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This event display shows an event with single cosmic muon passing by the detector and depositing 1.08 TeV in 1 Tile Calorimeter cell. Green line shows a reconstructed muon track. Yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the pink marker and circle in the eta-phi plot. The red dotted line is the direction of Missing ET. The bottom figure is the same event display with pulse shape from Tile Calorimeter PMT's.
Contact: Hideki.Okawa@cern.ch
Reference:
90272_L1Calo_ev1030029.png90272_L1Calo_ev1030029_withPulse.png
 

This figure shows the jet EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). Jet EM fraction is a ratio of energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. The distributions were normalized by the entries (areas are 1). EM fraction tends to concentrate around 0 or 1 for fake jets from cosmics, whereas QCD jets have a broad distribution of EM fraction peaking around 0.8. Good separation between real QCD jets and fake jets from cosmics were observed.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEMF_TopoR4.png
This figure shows the number of associated tracks in jets from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). "TrackParticleCandidate" (tracks reconstructed from Inner Detectors) are considered. Tracks are defined as associated when they are within deltaR = 0.4 (cone size) from jets. Fake jets tend to have low multiplicity of associated tracks. Good separation between real QCD jets and fake jets from cosmics were observed.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetNTrk_TopoR4.png
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Event Displays

This event display shows an event with single cosmic muon passing by the detector and depositing 1.23 TeV in 1 Tile Calorimeter cell. Green line shows muon segments. Yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the pink marker and circle in the eta-phi plot. The red dotted line is the direction of Missing ET. The bottom figure is the same event display with pulse shape from Tile Calorimeter PMT's (2 upper figures) and Liquid Argon (2 lower figures).
Contact: Hideki.Okawa@cern.ch
Reference:
90272_L1Calo_ev2006956_1.png90272_L1Calo_ev2006956_withPulse.png
 
Line: 32 to 38
 -- HidekiOkawa - 11 Mar 2009

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META FILEATTACHMENT attachment="JetEt_TopoR4.png" attr="" comment="" date="1237296269" name="JetEt_TopoR4.png" path="JetEt_TopoR4.png" size="13311" stream="JetEt_TopoR4.png" user="Main.HidekiOkawa" version="4"
META FILEATTACHMENT attachment="SumEt_Base.png" attr="" comment="" date="1237296572" name="SumEt_Base.png" path="SumEt_Base.png" size="13323" stream="SumEt_Base.png" user="Main.HidekiOkawa" version="3"
 
META FILEATTACHMENT attachment="JetNTrk_TopoR4.png" attr="" comment="" date="1236962916" name="JetNTrk_TopoR4.png" path="JetNTrk_TopoR4.png" size="14766" stream="JetNTrk_TopoR4.png" user="Main.HidekiOkawa" version="2"
META FILEATTACHMENT attachment="EvEMF_TopoR4.png" attr="" comment="" date="1236963239" name="EvEMF_TopoR4.png" path="EvEMF_TopoR4.png" size="16010" stream="EvEMF_TopoR4.png" user="Main.HidekiOkawa" version="1"
Changed:
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<
META FILEATTACHMENT attachment="JetEt_TopoR4_Cleaning.png" attr="" comment="" date="1236964515" name="JetEt_TopoR4_Cleaning.png" path="JetEt_TopoR4_Cleaning.png" size="13889" stream="JetEt_TopoR4_Cleaning.png" user="Main.HidekiOkawa" version="2"
>
>
META FILEATTACHMENT attachment="JetEt_TopoR4_Cleaning.png" attr="" comment="" date="1237292349" name="JetEt_TopoR4_Cleaning.png" path="JetEt_TopoR4_Cleaning.png" size="13262" stream="JetEt_TopoR4_Cleaning.png" user="Main.HidekiOkawa" version="3"
 
META FILEATTACHMENT attachment="90272_L1Calo_ev1030029.png" attr="" comment="" date="1236979710" name="90272_L1Calo_ev1030029.png" path="90272_L1Calo_ev1030029.png" size="75315" stream="90272_L1Calo_ev1030029.png" user="Main.HidekiOkawa" version="2"
META FILEATTACHMENT attachment="90272_L1Calo_ev1030029_withPulse.png" attr="" comment="" date="1236979348" name="90272_L1Calo_ev1030029_withPulse.png" path="90272_L1Calo_ev1030029_withPulse.png" size="146681" stream="90272_L1Calo_ev1030029_withPulse.png" user="Main.HidekiOkawa" version="1"
Changed:
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<
META FILEATTACHMENT attachment="JetSize_TopoR4.png" attr="" comment="" date="1237287169" name="JetSize_TopoR4.png" path="JetSize_TopoR4.png" size="15321" stream="JetSize_TopoR4.png" user="Main.HidekiOkawa" version="1"
>
>
META FILEATTACHMENT attachment="JetSize_TopoR4.png" attr="" comment="" date="1237295603" name="JetSize_TopoR4.png" path="JetSize_TopoR4.png" size="16299" stream="JetSize_TopoR4.png" user="Main.HidekiOkawa" version="2"
META FILEATTACHMENT attachment="90272_L1Calo_ev2006956_1.png" attr="" comment="" date="1237296975" name="90272_L1Calo_ev2006956_1.png" path="90272_L1Calo_ev2006956_1.png" size="75036" stream="90272_L1Calo_ev2006956_1.png" user="Main.HidekiOkawa" version="1"
META FILEATTACHMENT attachment="90272_L1Calo_ev2006956_withPulse.png" attr="" comment="" date="1237297015" name="90272_L1Calo_ev2006956_withPulse.png" path="90272_L1Calo_ev2006956_withPulse.png" size="143660" stream="90272_L1Calo_ev2006956_withPulse.png" user="Main.HidekiOkawa" version="1"

Revision 112009-03-17 - HidekiOkawa

Line: 1 to 1
 
META TOPICPARENT name="HidekiOkawa"

Cosmic Plots For Approval

<!--optional-->
Line: 17 to 17
 
This figure shows the number of associated tracks in jets from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). "TrackParticleCandidate" (tracks reconstructed from Inner Detectors) are considered. Tracks are defined as associated when they are within deltaR = 0.4 (cone size) from jets. Fake jets tend to have low multiplicity of associated tracks. Good separation between real QCD jets and fake jets from cosmics were observed.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetNTrk_TopoR4.png
Added:
>
>
This figure shows the jet size (number of clusters in jets) from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). Topoclusters are used for the input to jets, so jet size indicates the number of Topoclusters in jets. Fake jets tend to have low jet size. Good separation between real QCD jets and fake jets from cosmics were observed.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetSize_TopoR4.png
 

This figure shows the distribution of jet transverse energy from cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. The points are from data, and solid lines are from the Monte Carlo. Black distributions are before jet cleaning cuts. Red shows distributions after applying a cut on EM fraction (jets remain when 0.15 < EM fraction <0.97). No jets remain after applying cuts with EM fraction, the number of associated jets, and the number of clusters in jets.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEt_TopoR4_Cleaning.png
This figure shows the Event EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. The Event EM fraction is defined for each event as a weighted-average of jet EM fraction by jet ET. Jets with ET>7 GeV are considered. Good separation between real QCD jets and fake jets from cosmics were observed. Event EM fraction is a good candidate for "Missing ET cleaning."
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
EvEMF_TopoR4.png
Line: 37 to 39
 
META FILEATTACHMENT attachment="JetEt_TopoR4_Cleaning.png" attr="" comment="" date="1236964515" name="JetEt_TopoR4_Cleaning.png" path="JetEt_TopoR4_Cleaning.png" size="13889" stream="JetEt_TopoR4_Cleaning.png" user="Main.HidekiOkawa" version="2"
META FILEATTACHMENT attachment="90272_L1Calo_ev1030029.png" attr="" comment="" date="1236979710" name="90272_L1Calo_ev1030029.png" path="90272_L1Calo_ev1030029.png" size="75315" stream="90272_L1Calo_ev1030029.png" user="Main.HidekiOkawa" version="2"
META FILEATTACHMENT attachment="90272_L1Calo_ev1030029_withPulse.png" attr="" comment="" date="1236979348" name="90272_L1Calo_ev1030029_withPulse.png" path="90272_L1Calo_ev1030029_withPulse.png" size="146681" stream="90272_L1Calo_ev1030029_withPulse.png" user="Main.HidekiOkawa" version="1"
Added:
>
>
META FILEATTACHMENT attachment="JetSize_TopoR4.png" attr="" comment="" date="1237287169" name="JetSize_TopoR4.png" path="JetSize_TopoR4.png" size="15321" stream="JetSize_TopoR4.png" user="Main.HidekiOkawa" version="1"

Revision 102009-03-15 - HidekiOkawa

Line: 1 to 1
 
META TOPICPARENT name="HidekiOkawa"

Cosmic Plots For Approval

<!--optional-->
Line: 19 to 19
 
This figure shows the distribution of jet transverse energy from cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. The points are from data, and solid lines are from the Monte Carlo. Black distributions are before jet cleaning cuts. Red shows distributions after applying a cut on EM fraction (jets remain when 0.15 < EM fraction <0.97). No jets remain after applying cuts with EM fraction, the number of associated jets, and the number of clusters in jets.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEt_TopoR4_Cleaning.png
Changed:
<
<
This figure shows the Event EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. The Event EM fraction is defined per event as a weighted-average of jet EM fraction by jet ET. Jets with ET>7 GeV are considered. Good separation between real QCD jets and fake jets from cosmics were observed. Event EM fraction is a good candidate for "Missing ET cleaning."
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
EvEMF_TopoR4.png
>
>
This figure shows the Event EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. The Event EM fraction is defined for each event as a weighted-average of jet EM fraction by jet ET. Jets with ET>7 GeV are considered. Good separation between real QCD jets and fake jets from cosmics were observed. Event EM fraction is a good candidate for "Missing ET cleaning."
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
EvEMF_TopoR4.png
 

Revision 92009-03-14 - HidekiOkawa

Line: 1 to 1
 
META TOPICPARENT name="HidekiOkawa"

Cosmic Plots For Approval

<!--optional-->
Line: 7 to 7
 

Changed:
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<
This figure shows the distribution of Sum ET from cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only single muons are considered in the Monte Carlo (no air showers). MET_Base algorithm (cells with |E|>2 sigma are considered for the calculation) is used for the Sum ET calculation. The discrepancy in the first bin is due to the fact that trigger effects are not considered in the cosmic Monte Carlo.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
SumEt_Base.png
>
>
This figure shows the distribution of Sum ET from cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only single muons are considered in the Monte Carlo (no air showers). MET_Base algorithm (cells with |E|>2 sigma are considered for the calculation) is used for the Sum ET calculation. Monte Carlo distribution is normalized to data in 100-300 GeV range. The discrepancy in the first bin is due to the fact that trigger effects are not considered in the cosmic Monte Carlo.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
SumEt_Base.png
 
Changed:
<
<
This figure shows the distribution of jet transverse energy from cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only single muons are considered in the Monte Carlo (no air showers). ATLAS Cone Jet algorithm with cone size 0.4 is used. Topoclusters are used as inputs. Jet energy is at the EM scale.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEt_TopoR4.png
>
>
This figure shows the distribution of jet transverse energy from cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only single muons are considered in the Monte Carlo (no air showers). The same normalization factor as the figure above is applied. ATLAS Cone Jet algorithm with cone size 0.4 is used. Topoclusters are the inputs for jet reconstruction. Jet energy is at the EM scale.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEt_TopoR4.png
 
Changed:
<
<
This event display shows an event with single cosmic muon passing by the detector and depositing 1.08 TeV in 1 Tile Calorimeter cell. Green line shows a reconstructed muon track. Yellow boxes indicate energy deposits in the Tile Calorimeter. The pink line shows the direction of the reconstructed jet. The red dotted line shows the direction of Missing ET. The bottom figure is the same event display with pulse shape plots from Tile Calorimeter PMT's.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
90272_L1Calo_ev1030029.png90272_L1Calo_ev1030029_withPulse.png
>
>
This event display shows an event with single cosmic muon passing by the detector and depositing 1.08 TeV in 1 Tile Calorimeter cell. Green line shows a reconstructed muon track. Yellow boxes indicate energy deposits in the Tile Calorimeter. The direction of the reconstructed jet is shown by the pink marker and circle in the eta-phi plot. The red dotted line is the direction of Missing ET. The bottom figure is the same event display with pulse shape from Tile Calorimeter PMT's.
Contact: Hideki.Okawa@cern.ch
Reference:
90272_L1Calo_ev1030029.png90272_L1Calo_ev1030029_withPulse.png
 
Changed:
<
<
This figure shows the jet EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). Jet EM fraction is a ratio of energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. EM fraction tends to concentrate around 0 or 1 for fake jets from cosmics, whereas QCD jets have a broad distribution of EM fraction peaking around 0.8. Good separation between real QCD jets and fake jets from cosmics were observed.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEMF_TopoR4.png
>
>
This figure shows the jet EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). Jet EM fraction is a ratio of energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. The distributions were normalized by the entries (areas are 1). EM fraction tends to concentrate around 0 or 1 for fake jets from cosmics, whereas QCD jets have a broad distribution of EM fraction peaking around 0.8. Good separation between real QCD jets and fake jets from cosmics were observed.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEMF_TopoR4.png
 
Changed:
<
<
This figure shows the jet EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). Jet EM fraction is a ratio of energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. EM fraction tends to concentrate around 0 or 1 for fake jets from cosmics, whereas QCD jets have a broad distribution of EM fraction peaking around 0.8. Good separation between real QCD jets and fake jets from cosmics were observed.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetNTrk_TopoR4.png
>
>
This figure shows the number of associated tracks in jets from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). "TrackParticleCandidate" (tracks reconstructed from Inner Detectors) are considered. Tracks are defined as associated when they are within deltaR = 0.4 (cone size) from jets. Fake jets tend to have low multiplicity of associated tracks. Good separation between real QCD jets and fake jets from cosmics were observed.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetNTrk_TopoR4.png
 
Changed:
<
<
This figure shows the distribution of jet transverse energy from cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only single muons are considered in the Monte Carlo (no air showers). ATLAS Cone Jet algorithm with cone size 0.4 is used. Topoclusters are used as inputs. Jet energy is at the EM scale.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEt_TopoR4_Cleaning.png
>
>
This figure shows the distribution of jet transverse energy from cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. The points are from data, and solid lines are from the Monte Carlo. Black distributions are before jet cleaning cuts. Red shows distributions after applying a cut on EM fraction (jets remain when 0.15 < EM fraction <0.97). No jets remain after applying cuts with EM fraction, the number of associated jets, and the number of clusters in jets.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEt_TopoR4_Cleaning.png
 
Changed:
<
<
This figure shows the jet EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). Jet EM fraction is a ratio of energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. EM fraction tends to concentrate around 0 or 1 for fake jets from cosmics, whereas QCD jets have a broad distribution of EM fraction peaking around 0.8. Good separation between real QCD jets and fake jets from cosmics were observed.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
EvEMF_TopoR4.png
>
>
This figure shows the Event EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. The Event EM fraction is defined per event as a weighted-average of jet EM fraction by jet ET. Jets with ET>7 GeV are considered. Good separation between real QCD jets and fake jets from cosmics were observed. Event EM fraction is a good candidate for "Missing ET cleaning."
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
EvEMF_TopoR4.png
 
Line: 30 to 30
 -- HidekiOkawa - 11 Mar 2009

META FILEATTACHMENT attachment="JetEMF_TopoR4.png" attr="" comment="" date="1236962812" name="JetEMF_TopoR4.png" path="JetEMF_TopoR4.png" size="15765" stream="JetEMF_TopoR4.png" user="Main.HidekiOkawa" version="3"
Changed:
<
<
META FILEATTACHMENT attachment="JetEt_TopoR4.png" attr="" comment="" date="1236896536" name="JetEt_TopoR4.png" path="JetEt_TopoR4.png" size="12897" stream="JetEt_TopoR4.png" user="Main.HidekiOkawa" version="1"
META FILEATTACHMENT attachment="SumEt_Base.png" attr="" comment="" date="1236948446" name="SumEt_Base.png" path="SumEt_Base.png" size="13328" stream="SumEt_Base.png" user="Main.HidekiOkawa" version="1"
>
>
META FILEATTACHMENT attachment="JetEt_TopoR4.png" attr="" comment="" date="1237048103" name="JetEt_TopoR4.png" path="JetEt_TopoR4.png" size="13005" stream="JetEt_TopoR4.png" user="Main.HidekiOkawa" version="2"
META FILEATTACHMENT attachment="SumEt_Base.png" attr="" comment="" date="1237047807" name="SumEt_Base.png" path="SumEt_Base.png" size="13231" stream="SumEt_Base.png" user="Main.HidekiOkawa" version="2"
 
META FILEATTACHMENT attachment="JetNTrk_TopoR4.png" attr="" comment="" date="1236962916" name="JetNTrk_TopoR4.png" path="JetNTrk_TopoR4.png" size="14766" stream="JetNTrk_TopoR4.png" user="Main.HidekiOkawa" version="2"
META FILEATTACHMENT attachment="EvEMF_TopoR4.png" attr="" comment="" date="1236963239" name="EvEMF_TopoR4.png" path="EvEMF_TopoR4.png" size="16010" stream="EvEMF_TopoR4.png" user="Main.HidekiOkawa" version="1"
META FILEATTACHMENT attachment="JetEt_TopoR4_Cleaning.png" attr="" comment="" date="1236964515" name="JetEt_TopoR4_Cleaning.png" path="JetEt_TopoR4_Cleaning.png" size="13889" stream="JetEt_TopoR4_Cleaning.png" user="Main.HidekiOkawa" version="2"

Revision 82009-03-13 - HidekiOkawa

Line: 1 to 1
 
META TOPICPARENT name="HidekiOkawa"

Cosmic Plots For Approval

<!--optional-->
Line: 11 to 11
 
This figure shows the distribution of jet transverse energy from cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only single muons are considered in the Monte Carlo (no air showers). ATLAS Cone Jet algorithm with cone size 0.4 is used. Topoclusters are used as inputs. Jet energy is at the EM scale.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEt_TopoR4.png
Added:
>
>
This event display shows an event with single cosmic muon passing by the detector and depositing 1.08 TeV in 1 Tile Calorimeter cell. Green line shows a reconstructed muon track. Yellow boxes indicate energy deposits in the Tile Calorimeter. The pink line shows the direction of the reconstructed jet. The red dotted line shows the direction of Missing ET. The bottom figure is the same event display with pulse shape plots from Tile Calorimeter PMT's.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
90272_L1Calo_ev1030029.png90272_L1Calo_ev1030029_withPulse.png
 

This figure shows the jet EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). Jet EM fraction is a ratio of energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. EM fraction tends to concentrate around 0 or 1 for fake jets from cosmics, whereas QCD jets have a broad distribution of EM fraction peaking around 0.8. Good separation between real QCD jets and fake jets from cosmics were observed.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEMF_TopoR4.png
This figure shows the jet EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). Jet EM fraction is a ratio of energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. EM fraction tends to concentrate around 0 or 1 for fake jets from cosmics, whereas QCD jets have a broad distribution of EM fraction peaking around 0.8. Good separation between real QCD jets and fake jets from cosmics were observed.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetNTrk_TopoR4.png
Line: 33 to 35
 
META FILEATTACHMENT attachment="JetNTrk_TopoR4.png" attr="" comment="" date="1236962916" name="JetNTrk_TopoR4.png" path="JetNTrk_TopoR4.png" size="14766" stream="JetNTrk_TopoR4.png" user="Main.HidekiOkawa" version="2"
META FILEATTACHMENT attachment="EvEMF_TopoR4.png" attr="" comment="" date="1236963239" name="EvEMF_TopoR4.png" path="EvEMF_TopoR4.png" size="16010" stream="EvEMF_TopoR4.png" user="Main.HidekiOkawa" version="1"
META FILEATTACHMENT attachment="JetEt_TopoR4_Cleaning.png" attr="" comment="" date="1236964515" name="JetEt_TopoR4_Cleaning.png" path="JetEt_TopoR4_Cleaning.png" size="13889" stream="JetEt_TopoR4_Cleaning.png" user="Main.HidekiOkawa" version="2"
Added:
>
>
META FILEATTACHMENT attachment="90272_L1Calo_ev1030029.png" attr="" comment="" date="1236979710" name="90272_L1Calo_ev1030029.png" path="90272_L1Calo_ev1030029.png" size="75315" stream="90272_L1Calo_ev1030029.png" user="Main.HidekiOkawa" version="2"
META FILEATTACHMENT attachment="90272_L1Calo_ev1030029_withPulse.png" attr="" comment="" date="1236979348" name="90272_L1Calo_ev1030029_withPulse.png" path="90272_L1Calo_ev1030029_withPulse.png" size="146681" stream="90272_L1Calo_ev1030029_withPulse.png" user="Main.HidekiOkawa" version="1"

Revision 72009-03-13 - HidekiOkawa

Line: 1 to 1
 
META TOPICPARENT name="HidekiOkawa"

Cosmic Plots For Approval

<!--optional-->
Line: 15 to 15
 
This figure shows the jet EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). Jet EM fraction is a ratio of energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. EM fraction tends to concentrate around 0 or 1 for fake jets from cosmics, whereas QCD jets have a broad distribution of EM fraction peaking around 0.8. Good separation between real QCD jets and fake jets from cosmics were observed.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetNTrk_TopoR4.png
Added:
>
>

This figure shows the distribution of jet transverse energy from cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only single muons are considered in the Monte Carlo (no air showers). ATLAS Cone Jet algorithm with cone size 0.4 is used. Topoclusters are used as inputs. Jet energy is at the EM scale.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEt_TopoR4_Cleaning.png
This figure shows the jet EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). Jet EM fraction is a ratio of energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. EM fraction tends to concentrate around 0 or 1 for fake jets from cosmics, whereas QCD jets have a broad distribution of EM fraction peaking around 0.8. Good separation between real QCD jets and fake jets from cosmics were observed.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
EvEMF_TopoR4.png
 
Changed:
<
<
>
>
  -- HidekiOkawa - 11 Mar 2009
Changed:
<
<
META FILEATTACHMENT attachment="JetEMF_TopoR4.png" attr="" comment="" date="1236876890" name="JetEMF_TopoR4.png" path="JetEMF_TopoR4.png" size="14201" stream="JetEMF_TopoR4.png" user="Main.HidekiOkawa" version="2"
>
>
META FILEATTACHMENT attachment="JetEMF_TopoR4.png" attr="" comment="" date="1236962812" name="JetEMF_TopoR4.png" path="JetEMF_TopoR4.png" size="15765" stream="JetEMF_TopoR4.png" user="Main.HidekiOkawa" version="3"
 
META FILEATTACHMENT attachment="JetEt_TopoR4.png" attr="" comment="" date="1236896536" name="JetEt_TopoR4.png" path="JetEt_TopoR4.png" size="12897" stream="JetEt_TopoR4.png" user="Main.HidekiOkawa" version="1"
META FILEATTACHMENT attachment="SumEt_Base.png" attr="" comment="" date="1236948446" name="SumEt_Base.png" path="SumEt_Base.png" size="13328" stream="SumEt_Base.png" user="Main.HidekiOkawa" version="1"
Changed:
<
<
META FILEATTACHMENT attachment="JetNTrk_TopoR4.png" attr="" comment="" date="1236951343" name="JetNTrk_TopoR4.png" path="JetNTrk_TopoR4.png" size="13753" stream="JetNTrk_TopoR4.png" user="Main.HidekiOkawa" version="1"
>
>
META FILEATTACHMENT attachment="JetNTrk_TopoR4.png" attr="" comment="" date="1236962916" name="JetNTrk_TopoR4.png" path="JetNTrk_TopoR4.png" size="14766" stream="JetNTrk_TopoR4.png" user="Main.HidekiOkawa" version="2"
META FILEATTACHMENT attachment="EvEMF_TopoR4.png" attr="" comment="" date="1236963239" name="EvEMF_TopoR4.png" path="EvEMF_TopoR4.png" size="16010" stream="EvEMF_TopoR4.png" user="Main.HidekiOkawa" version="1"
META FILEATTACHMENT attachment="JetEt_TopoR4_Cleaning.png" attr="" comment="" date="1236964515" name="JetEt_TopoR4_Cleaning.png" path="JetEt_TopoR4_Cleaning.png" size="13889" stream="JetEt_TopoR4_Cleaning.png" user="Main.HidekiOkawa" version="2"

Revision 62009-03-13 - AdamGibson

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META TOPICPARENT name="HidekiOkawa"

Cosmic Plots For Approval

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Revision 52009-03-13 - HidekiOkawa

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META TOPICPARENT name="HidekiOkawa"

Cosmic Plots For Approval

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Jets/Missing Et from Cosmic Runs

Changed:
<
<
This figure shows the distribution of Sum ET from cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only single muons are considered in the Monte Carlo (no air showers).
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
SumEt_Base.png
>
>
This figure shows the distribution of Sum ET from cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only single muons are considered in the Monte Carlo (no air showers). MET_Base algorithm (cells with |E|>2 sigma are considered for the calculation) is used for the Sum ET calculation. The discrepancy in the first bin is due to the fact that trigger effects are not considered in the cosmic Monte Carlo.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
SumEt_Base.png
 

This figure shows the distribution of jet transverse energy from cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only single muons are considered in the Monte Carlo (no air showers). ATLAS Cone Jet algorithm with cone size 0.4 is used. Topoclusters are used as inputs. Jet energy is at the EM scale.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEt_TopoR4.png
This figure shows the jet EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). Jet EM fraction is a ratio of energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. EM fraction tends to concentrate around 0 or 1 for fake jets from cosmics, whereas QCD jets have a broad distribution of EM fraction peaking around 0.8. Good separation between real QCD jets and fake jets from cosmics were observed.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEMF_TopoR4.png
Added:
>
>
This figure shows the jet EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). Jet EM fraction is a ratio of energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. EM fraction tends to concentrate around 0 or 1 for fake jets from cosmics, whereas QCD jets have a broad distribution of EM fraction peaking around 0.8. Good separation between real QCD jets and fake jets from cosmics were observed.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetNTrk_TopoR4.png
 
Line: 22 to 24
 
META FILEATTACHMENT attachment="JetEMF_TopoR4.png" attr="" comment="" date="1236876890" name="JetEMF_TopoR4.png" path="JetEMF_TopoR4.png" size="14201" stream="JetEMF_TopoR4.png" user="Main.HidekiOkawa" version="2"
META FILEATTACHMENT attachment="JetEt_TopoR4.png" attr="" comment="" date="1236896536" name="JetEt_TopoR4.png" path="JetEt_TopoR4.png" size="12897" stream="JetEt_TopoR4.png" user="Main.HidekiOkawa" version="1"
Added:
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META FILEATTACHMENT attachment="SumEt_Base.png" attr="" comment="" date="1236948446" name="SumEt_Base.png" path="SumEt_Base.png" size="13328" stream="SumEt_Base.png" user="Main.HidekiOkawa" version="1"
META FILEATTACHMENT attachment="JetNTrk_TopoR4.png" attr="" comment="" date="1236951343" name="JetNTrk_TopoR4.png" path="JetNTrk_TopoR4.png" size="13753" stream="JetNTrk_TopoR4.png" user="Main.HidekiOkawa" version="1"

Revision 42009-03-12 - HidekiOkawa

Line: 1 to 1
 
META TOPICPARENT name="HidekiOkawa"

Cosmic Plots For Approval

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Line: 6 to 6
 

Jets/Missing Et from Cosmic Runs

Changed:
<
<
This figure shows the jet EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Jet EM fraction is a ratio of energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. EM fraction tends to concentrate around 0 or 1 for fake jets from cosmics, whereas QCD jets have a broad distribution of EM fraction peaking around 0.8. Good separation between real QCD jets and fake jets from cosmics were observed.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEMF_TopoR4.png
>
>

This figure shows the distribution of Sum ET from cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only single muons are considered in the Monte Carlo (no air showers).
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
SumEt_Base.png
This figure shows the distribution of jet transverse energy from cosmic L1Calo stream (run 90272 in Sep. 2008) and cosmic Monte Carlo. Only single muons are considered in the Monte Carlo (no air showers). ATLAS Cone Jet algorithm with cone size 0.4 is used. Topoclusters are used as inputs. Jet energy is at the EM scale.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEt_TopoR4.png
This figure shows the jet EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Only single muons are considered in the Monte Carlo (no air showers). Jet EM fraction is a ratio of energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. EM fraction tends to concentrate around 0 or 1 for fake jets from cosmics, whereas QCD jets have a broad distribution of EM fraction peaking around 0.8. Good separation between real QCD jets and fake jets from cosmics were observed.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEMF_TopoR4.png
 
Line: 16 to 21
 -- HidekiOkawa - 11 Mar 2009

META FILEATTACHMENT attachment="JetEMF_TopoR4.png" attr="" comment="" date="1236876890" name="JetEMF_TopoR4.png" path="JetEMF_TopoR4.png" size="14201" stream="JetEMF_TopoR4.png" user="Main.HidekiOkawa" version="2"
Added:
>
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META FILEATTACHMENT attachment="JetEt_TopoR4.png" attr="" comment="" date="1236896536" name="JetEt_TopoR4.png" path="JetEt_TopoR4.png" size="12897" stream="JetEt_TopoR4.png" user="Main.HidekiOkawa" version="1"

Revision 32009-03-12 - HidekiOkawa

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META TOPICPARENT name="HidekiOkawa"

Cosmic Plots For Approval

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Line: 15 to 15
  -- HidekiOkawa - 11 Mar 2009
Changed:
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<
META FILEATTACHMENT attachment="JetEMF_TopoR4.png" attr="" comment="" date="1236854166" name="JetEMF_TopoR4.png" path="JetEMF_TopoR4.png" size="14182" stream="JetEMF_TopoR4.png" user="Main.HidekiOkawa" version="1"
>
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META FILEATTACHMENT attachment="JetEMF_TopoR4.png" attr="" comment="" date="1236876890" name="JetEMF_TopoR4.png" path="JetEMF_TopoR4.png" size="14201" stream="JetEMF_TopoR4.png" user="Main.HidekiOkawa" version="2"

Revision 22009-03-12 - HidekiOkawa

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META TOPICPARENT name="HidekiOkawa"

Cosmic Plots For Approval

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Line: 6 to 6
 

Jets/Missing Et from Cosmic Runs

Changed:
<
<
Explanation.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
>
>
This figure shows the jet EM fraction from cosmic L1Calo stream (run 90272 in Sep. 2008), cosmic Monte Carlo, and QCD di-jet Monte Carlo samples. Jet EM fraction is a ratio of energy deposited in the EM calorimeter (Presampler, EM Liquid Argon, and the 1st layer of Forward Calorimeter) and the whole calorimeter. EM fraction tends to concentrate around 0 or 1 for fake jets from cosmics, whereas QCD jets have a broad distribution of EM fraction peaking around 0.8. Good separation between real QCD jets and fake jets from cosmics were observed.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007
JetEMF_TopoR4.png
 
Line: 14 to 14
 

-- HidekiOkawa - 11 Mar 2009

Added:
>
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META FILEATTACHMENT attachment="JetEMF_TopoR4.png" attr="" comment="" date="1236854166" name="JetEMF_TopoR4.png" path="JetEMF_TopoR4.png" size="14182" stream="JetEMF_TopoR4.png" user="Main.HidekiOkawa" version="1"

Revision 12009-03-11 - HidekiOkawa

Line: 1 to 1
Added:
>
>
META TOPICPARENT name="HidekiOkawa"

Cosmic Plots For Approval

<!--optional-->

Jets/Missing Et from Cosmic Runs

Explanation.
Contact: Hideki.Okawa@cern.ch
Reference: ATL-COM-CAL-2008-007

-- HidekiOkawa - 11 Mar 2009

 
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