Difference: AtlPhysPub2010093 (1 vs. 5)

Revision 52017-04-25 - AlexeyBoldyrev

Line: 1 to 1
Changed:
<
<
META TOPICPARENT name="WebPreferences"
>
>
META TOPICPARENT name="WebHome"
 AtlasPublicTopicHeader.png

Strategy to Search for Single-Top Events using early Data of the ATLAS Detector at the LHC

Revision 42010-12-10 - unknown

Line: 1 to 1
 
META TOPICPARENT name="WebPreferences"
AtlasPublicTopicHeader.png

Strategy to Search for Single-Top Events using early Data of the ATLAS Detector at the LHC

Changed:
<
<
This page contains approved plots and results as they appear in the ATL-PHYS-PUB-2010-093 note. Only the note contains all the relevant information and should thus be consulted if one of the plots is used.
>
>
<!-- The following reference is wrong - I (J. Donini) changed it to the correct one   !-->
<!--    This page contains approved plots and results as they appear in the ATL-PHYS-PUB-2010-093 note. Only the note contains all the relevant information and should thus be consulted if one of the plots is used. !-->
This page contains approved plots and results as they appear in the ATL-PHYS-PUB-2010-003 note. Only the note contains all the relevant information and should thus be consulted if one of the plots is used.
 
<!--optional-->

Revision 32010-12-06 - ElmarRitsch

Line: 1 to 1
 
META TOPICPARENT name="WebPreferences"
Changed:
<
<
No permission to view Atlas.AtlasPublicTopic
<!--  
  • Set DENYTOPICVIEW =
  • Set ALLOWTOPICCHANGE = atlas-readaccess-current-physicists
-->
>
>
AtlasPublicTopicHeader.png
 

Strategy to Search for Single-Top Events using early Data of the ATLAS Detector at the LHC

Revision 22010-05-20 - unknown

Line: 1 to 1
 
META TOPICPARENT name="WebPreferences"
Warning
Can't INCLUDE Atlas.AtlasPublicTopic repeatedly, topic is already included.
Line: 55 to 55
  Atl10-93-07
Figure 5: Examples of input variables to the NN in the 3-jets Pretag data set. The distributions are
Changed:
<
<
normalized to an integrated luminosity of 200 pb��1. Left side: HT . Right side: m(j1j2). The right most
>
>
normalized to an integrated luminosity of 200 pb-1. Left side: HT . Right side: m(j1j2). The right most
 bin in each distribution contains the overfow bin.
Line: 64 to 64
  Atl10-93-08
Figure 6: The distributions of the NN output. Left side: Template distributions normalized to unit area.
Changed:
<
<
Right side: Expected distribution for an integrated luminosity of 200 pb��1.
>
>
Right side: Expected distribution for an integrated luminosity of 200 pb-1.
 
Line: 72 to 72
  Atl10-93-09 Atl10-93-10
Changed:
<
<
Figure 7: Shape uncertainty for a JES shift of 5% for the two most important processes, W+jets (left) and tt (right). The lower plots show the ratios of the template histograms and thus gives the relative
>
>
Figure 7: Shape uncertainty for a JES shift of +/5% for the two most important processes, W+jets (left) and ttbar (right). The lower plots show the ratios of the template histograms and thus gives the relative
 change in each bin.
Line: 82 to 82
  Atl10-93-11 Atl10-93-12
Changed:
<
<
Figure 8: Effect of JES uncertainty on rates tted in pseudo-experiments normalized to the expectation ( ). Left side: distribution for W+jets. Right side: distribution for tt. The black histograms
>
>
Figure 8: Effect of JES uncertainty on rates fitted in pseudo-experiments normalized to the expectation (Beta). Left side: distribution for W+jets. Right side: distribution for ttbar. The black histograms
 centered at one show the outcome of pseudo-experiments with unaltered JES, the default setting. The median of this distribution is taken as reference. To estimate the impact of an altered JES we perform
Changed:
<
<
ensemble tests in which the JES is altered by +5% or by ��5%. The resulting distributions of are shown: +5% (blue) and ��5% (red). The median of these distributions is shifted by an amount  which indicates that we expect to measure a higher (or lower) rate of events in the case that the JES is di ering by 5%, compared to the rate we expect in case of an unaltered JES. We de ne the shift as a measure
>
>
ensemble tests in which the JES is altered by +5% or by -5%. The resulting distributions of Beta are shown: +5% (blue) and -5% (red). The median of these distributions is shifted by an amount Delta which indicates that we expect to measure a higher (or lower) rate of events in the case that the JES is differing by +/5%, compared to the rate we expect in case of an unaltered JES. We define the shift as a measure
 of the systematic uncertainty on our rate measurement.
Line: 98 to 98
  Atl10-93-13 Atl10-93-14
Changed:
<
<
Figure 9: Distribution of likelihood ratios discriminants in 200 pb��1 in the 2-jets tagged sample. Two discriminants are constructed, one for the rejection of tt events, Ltt, (left) and another for the rejection
>
>
Figure 9: Distribution of likelihood ratios discriminants in 200 pb-1 in the 2-jets tagged sample. Two discriminants are constructed, one for the rejection of ttbar events, Lttbar, (left) and another for the rejection
 of W+jets process, LW+jets, (right). The cross section determination is performed with events in which both likelihood ratios exceed 0.9.

Revision 12010-05-19 - unknown

Line: 1 to 1
Added:
>
>
META TOPICPARENT name="WebPreferences"
Warning
Can't INCLUDE Atlas.AtlasPublicTopic repeatedly, topic is already included.
<!--  
  • Set DENYTOPICVIEW =
  • Set ALLOWTOPICCHANGE = atlas-readaccess-current-physicists
-->

Strategy to Search for Single-Top Events using early Data of the ATLAS Detector at the LHC

This page contains approved plots and results as they appear in the ATL-PHYS-PUB-2010-093 note. Only the note contains all the relevant information and should thus be consulted if one of the plots is used.
<!--optional-->

Atl10-93-00
Figure 1: Leading diagrams corresponding to the three production mechanisms of single-top events: (a) t-channel production, (b) Wt-channel associated production, (c) s-channel.

Atl10-93-01 Atl10-93-02
Figure 2: Figure 2: Stacked jet multiplicity distributions for preselected events, without b-tagging requirement (left plot) and for events with at least one b-tagged jet (right plot).

Atl10-93-03
Figure 3: Reconstructed leptonic top-quark mass for events with exactly two jets that pass the event preselection.

Atl10-93-04 Atl09-93-05
Figure 4: Examples of input variables to the NN in the 3-jets Pretag data set. The right most bin indicates the overfow bin. Left side: HT distribution. Right side: m(j1j2) distribution. See text for details.

Atl10-93-06 Atl10-93-07
Figure 5: Examples of input variables to the NN in the 3-jets Pretag data set. The distributions are normalized to an integrated luminosity of 200 pb��1. Left side: HT . Right side: m(j1j2). The right most bin in each distribution contains the overfow bin.

Atl10-93-08
Figure 6: The distributions of the NN output. Left side: Template distributions normalized to unit area. Right side: Expected distribution for an integrated luminosity of 200 pb��1.

Atl10-93-09 Atl10-93-10
Figure 7: Shape uncertainty for a JES shift of 5% for the two most important processes, W+jets (left) and tt (right). The lower plots show the ratios of the template histograms and thus gives the relative change in each bin.

Atl10-93-11 Atl10-93-12
Figure 8: Effect of JES uncertainty on rates tted in pseudo-experiments normalized to the expectation ( ). Left side: distribution for W+jets. Right side: distribution for tt. The black histograms centered at one show the outcome of pseudo-experiments with unaltered JES, the default setting. The median of this distribution is taken as reference. To estimate the impact of an altered JES we perform ensemble tests in which the JES is altered by +5% or by ��5%. The resulting distributions of are shown: +5% (blue) and ��5% (red). The median of these distributions is shifted by an amount  which indicates that we expect to measure a higher (or lower) rate of events in the case that the JES is di ering by 5%, compared to the rate we expect in case of an unaltered JES. We de ne the shift as a measure of the systematic uncertainty on our rate measurement.

Atl10-93-13 Atl10-93-14
Figure 9: Distribution of likelihood ratios discriminants in 200 pb��1 in the 2-jets tagged sample. Two discriminants are constructed, one for the rejection of tt events, Ltt, (left) and another for the rejection of W+jets process, LW+jets, (right). The cross section determination is performed with events in which both likelihood ratios exceed 0.9.

<!--***********************************************************-->
<!--Do NOT remove the remaining lines, but add requested info as appropriate-->
<!--***********************************************************-->


<!--For significant updates to the topic, consider adding your 'signature' (beneath this editing box)-->
Major updates:
-- KyleStevenson - 19-May-2010

<!--Person responsible for the page: 
Either leave as is - the creator's name will be inserted; 
Or replace the complete REVINFO tag (including percentages symbols) with a name in the form TwikiUsersName-->
Responsible: Main.unknown
<!--Once this page has been reviewed, please add the name and the date e.g. StephenHaywood - 31 Oct 2006 -->
Last reviewed by: Never reviewed

META FILEATTACHMENT attachment="Atl10-93-00.jpg" attr="" comment="" date="1274284114" name="Atl10-93-00.jpg" path="Atl10-93-00.jpg" size="15168" stream="Atl10-93-00.jpg" tmpFilename="/usr/tmp/CGItemp64602" user="kyle_2ejames_2estevenson_40cern_2ech" version="1"
META FILEATTACHMENT attachment="Atl10-93-01.jpg" attr="" comment="" date="1274284134" name="Atl10-93-01.jpg" path="Atl10-93-01.jpg" size="28639" stream="Atl10-93-01.jpg" tmpFilename="/usr/tmp/CGItemp64592" user="kyle_2ejames_2estevenson_40cern_2ech" version="1"
META FILEATTACHMENT attachment="Atl10-93-02.jpg" attr="" comment="" date="1274284147" name="Atl10-93-02.jpg" path="Atl10-93-02.jpg" size="30780" stream="Atl10-93-02.jpg" tmpFilename="/usr/tmp/CGItemp64486" user="kyle_2ejames_2estevenson_40cern_2ech" version="1"
META FILEATTACHMENT attachment="Atl10-93-03.jpg" attr="" comment="" date="1274284160" name="Atl10-93-03.jpg" path="Atl10-93-03.jpg" size="53732" stream="Atl10-93-03.jpg" tmpFilename="/usr/tmp/CGItemp64588" user="kyle_2ejames_2estevenson_40cern_2ech" version="1"
META FILEATTACHMENT attachment="Atl10-93-04.jpg" attr="" comment="" date="1274284171" name="Atl10-93-04.jpg" path="Atl10-93-04.jpg" size="39732" stream="Atl10-93-04.jpg" tmpFilename="/usr/tmp/CGItemp64584" user="kyle_2ejames_2estevenson_40cern_2ech" version="1"
META FILEATTACHMENT attachment="Atl10-93-05.jpg" attr="" comment="" date="1274284187" name="Atl10-93-05.jpg" path="Atl10-93-05.jpg" size="46625" stream="Atl10-93-05.jpg" tmpFilename="/usr/tmp/CGItemp64613" user="kyle_2ejames_2estevenson_40cern_2ech" version="1"
META FILEATTACHMENT attachment="Atl10-93-06.jpg" attr="" comment="" date="1274284198" name="Atl10-93-06.jpg" path="Atl10-93-06.jpg" size="44239" stream="Atl10-93-06.jpg" tmpFilename="/usr/tmp/CGItemp64553" user="kyle_2ejames_2estevenson_40cern_2ech" version="1"
META FILEATTACHMENT attachment="Atl10-93-07.jpg" attr="" comment="" date="1274284212" name="Atl10-93-07.jpg" path="Atl10-93-07.jpg" size="47394" stream="Atl10-93-07.jpg" tmpFilename="/usr/tmp/CGItemp64553" user="kyle_2ejames_2estevenson_40cern_2ech" version="1"
META FILEATTACHMENT attachment="Atl10-93-08.jpg" attr="" comment="" date="1274284251" name="Atl10-93-08.jpg" path="Atl10-93-08.jpg" size="71443" stream="Atl10-93-08.jpg" tmpFilename="/usr/tmp/CGItemp64645" user="kyle_2ejames_2estevenson_40cern_2ech" version="1"
META FILEATTACHMENT attachment="Atl10-93-09.jpg" attr="" comment="" date="1274284262" name="Atl10-93-09.jpg" path="Atl10-93-09.jpg" size="44879" stream="Atl10-93-09.jpg" tmpFilename="/usr/tmp/CGItemp64496" user="kyle_2ejames_2estevenson_40cern_2ech" version="1"
META FILEATTACHMENT attachment="Atl10-93-10.jpg" attr="" comment="" date="1274284281" name="Atl10-93-10.jpg" path="Atl10-93-10.jpg" size="45964" stream="Atl10-93-10.jpg" tmpFilename="/usr/tmp/CGItemp64586" user="kyle_2ejames_2estevenson_40cern_2ech" version="1"
META FILEATTACHMENT attachment="Atl10-93-11.jpg" attr="" comment="" date="1274284294" name="Atl10-93-11.jpg" path="Atl10-93-11.jpg" size="33072" stream="Atl10-93-11.jpg" tmpFilename="/usr/tmp/CGItemp64583" user="kyle_2ejames_2estevenson_40cern_2ech" version="1"
META FILEATTACHMENT attachment="Atl10-93-12.jpg" attr="" comment="" date="1274284306" name="Atl10-93-12.jpg" path="Atl10-93-12.jpg" size="36935" stream="Atl10-93-12.jpg" tmpFilename="/usr/tmp/CGItemp64604" user="kyle_2ejames_2estevenson_40cern_2ech" version="1"
META FILEATTACHMENT attachment="Atl10-93-13.jpg" attr="" comment="" date="1274284328" name="Atl10-93-13.jpg" path="Atl10-93-13.jpg" size="35517" stream="Atl10-93-13.jpg" tmpFilename="/usr/tmp/CGItemp64604" user="kyle_2ejames_2estevenson_40cern_2ech" version="1"
META FILEATTACHMENT attachment="Atl10-93-14.jpg" attr="" comment="" date="1274284339" name="Atl10-93-14.jpg" path="Atl10-93-14.jpg" size="39226" stream="Atl10-93-14.jpg" tmpFilename="/usr/tmp/CGItemp64642" user="kyle_2ejames_2estevenson_40cern_2ech" version="1"
 
This site is powered by the TWiki collaboration platform Powered by PerlCopyright & 2008-2019 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding TWiki? Send feedback