ATLAS Event Displays from CONF notes

The event displays below are part of ATLAS CONF notes and are approved to be shown by ATLAS speakers at conferences and similar events. If you wish to use these event displays for other purposes than presentations of ATLAS results, please see the copyright statement.

The main Event Display Public Page gives an overview on all available public event displays.

2010
2011
2012

2010

Performance of the ATLAS Secondary Vertex b-tagging Algorithm in 900 GeV Collision Data (ATLAS-CONF-2010-004, 8 March 2010)

Figure 7: Event display of a b-jet candidate event. Only tracks in the barrel region with p_T > 500 MeV are displayed. The detector elements shown are the three barrel layers of the Pixel detector. eps, 666kB png, 307kB

Figure 7:
Event display of a b-jet candidate event. Only tracks in the barrel region with p_T > 500 MeV are displayed. The detector elements shown are the three barrel layers of the Pixel detector.
eps, 666kB
png, 307kB

Performance of the Electron and Photon Trigger in p-p Collisions at sqrt(s) = 900 GeV (ATLAS-CONF-2010-022, 20 April 2010)

Figure 9: Example of an electron candidate passing the medium offline selections as seen by the L2 algorithms. The particle deposits its energy in the first and second EM layer and the reconstructed IdScan track points straight at the cluster. In addition on the right side, the transverse energy of the L1 trigger towers are shown. eps, 1501kB png, 291kB

Figure 9:
Example of an electron candidate passing the medium offline selections as seen by the L2 algorithms. The particle deposits its energy in the first and second EM layer and the reconstructed IdScan track points straight at the cluster. In addition on the right side, the transverse energy of the L1 trigger towers are shown.
eps, 1501kB
png, 291kB

Search for top pair candidate events in ATLAS at sqrt(s)=7 TeV (ATLAS-CONF-2010-063, 21 July 2010)

Figure 8: Event display of the electron plus jets candidate LJ2. The electron is shown as the orange downward-pointing track associated to the green cluster, and as the green tower in the eta-phi lego plot. The direction of the missing transverse energy is shown as the dotted line in the r-phi view. png, 483kB
Figure 9: Event display of the ee dilepton candidate DL1. The electrons are shown as the two upward-pointing orange and green tracks. png, 377kB
Figure 10: Event display of the e-mu dilepton candidate DL2. The isolated muon track is shown in red, the isolated electron is shown as a green track pointing to a green cluster. The b-tagged jet is marked as a blue circle in the eta-phi lego plot. The direction of the missing transverse energy is shown as a dashed line in the eta-phi lego plot. png, 216kB

Early supersymmetry searches in channels with jets and missing transverse momentum with the ATLAS Detector (ATLAS-CONF-2010-065, 20 July 2010)

Figure 14: Event display of the collision (run number 158116, event number 5513627) which has m_eff of about 1.5 TeV when only the the leading three jets are included in the scalar sum increasing to about 1.65 TeV if all four high-energy jets are included. The size of the missing transverse momentum is about 100 GeV. The missing transverse momentum vector lies within the radius of a jet with a secondary vertex tag. All of the high energy jets are associated with the same primary vertex. png, 1131kB

Figure 14:
Event display of the collision (run number 158116, event number 5513627) which has m_eff of about 1.5 TeV when only the the leading three jets are included in the scalar sum increasing to about 1.65 TeV if all four high-energy jets are included. The size of the missing transverse momentum is about 100 GeV. The missing transverse momentum vector lies within the radius of a jet with a secondary vertex tag. All of the high energy jets are associated with the same primary vertex.
png, 1131kB

Early supersymmetry searches with jets, missing transverse momentum and one or more leptons with the ATLAS Detector (ATLAS-CONF-2010-066, 20 July 2010)

Figure 9: Event display of the collision (run number 155569, event number 5091167) with m_eff of 915 GeV when only the leading two jets are included in the scalar sum increasing to 1156 GeV if all jets are included. There are a total of 145 tracks associated with the primary vertex; no second vertex is reconstructed. The missing transverse momentum is 118 GeV. There is one well isolated positively charged muon with p_T of 25 GeV, and eta=2.33. That muon is cleanly selected with 11 hits on the monitored drift tubes, 6 on the cathode strip chambers, 5 pixel hits and 8 silicon strip hits. png, 579kB

Figure 9:
Event display of the collision (run number 155569, event number 5091167) with m_eff of 915 GeV when only the leading two jets are included in the scalar sum increasing to 1156 GeV if all jets are included. There are a total of 145 tracks associated with the primary vertex; no second vertex is reconstructed. The missing transverse momentum is 118 GeV. There is one well isolated positively charged muon with p_T of 25 GeV, and eta=2.33. That muon is cleanly selected with 11 hits on the monitored drift tubes, 6 on the cathode strip chambers, 5 pixel hits and 8 silicon strip hits.
png, 579kB

Early supersymmetry searches in events with missing transverse energy and b-jets with the ATLAS detector (ATLAS-CONF-2010-079, 20 August 2010)

Figure 14: Transverse (top left), longitudinal (bottom) and lego plot (top right) views of the event EV1 (see Table in the text), with 3 b-tagged jets. The energy deposited in the electromagnetic (hadronic) calorimeter is shown in green (red). The direction of the ETmiss is along the dotted red line. Same colour is applied to all the tracks associated to a particular jet. Muon segments are also shown. eps, 4374kB png, 299kB
Figure 15: Transverse (top left), longitudinal (bottom) and lego plot (top right) views of the event EV2 (see Table in the text), with 1 b-tagged jet and an isolated electron candidate. The energy deposited in the electromagnetic (hadronic) calorimeter is shown in green (red). The direction of the ETmiss is along the dotted red line. Same colour is applied to all the tracks associated to a particular jet. Muon segments are also shown. eps, 4039kB png, 266kB

Figure 14:
Transverse (top left), longitudinal (bottom) and lego plot (top right) views of the event EV1 (see Table in the text), with 3 b-tagged jets. The energy deposited in the electromagnetic (hadronic) calorimeter is shown in green (red). The direction of the ETmiss is along the dotted red line. Same colour is applied to all the tracks associated to a particular jet. Muon segments are also shown.
eps, 4374kB
png, 299kB

Figure 15:
Transverse (top left), longitudinal (bottom) and lego plot (top right) views of the event EV2 (see Table in the text), with 1 b-tagged jet and an isolated electron candidate. The energy deposited in the electromagnetic (hadronic) calorimeter is shown in green (red). The direction of the ETmiss is along the dotted red line. Same colour is applied to all the tracks associated to a particular jet. Muon segments are also shown.
eps, 4039kB
png, 266kB

2011

Measurement of the W+ W-; production cross section in proton-proton collisions at sqrt(s) = 7 TeV with the ATLAS detector (ATLAS-CONF-2011-015, 9 March 2011)

Figure 8: Event display of a WW candidate event in the emu final state. png, 2167kB
Figure 9: Event display of a WW candidate event in the ee final state. png, 875kB
Figure 10: Event display of a WW candidate event in the mumu final state. png, 1076kB

Measurement of multi-jet cross-sections in proton-proton collisions at 7 TeV center-of-mass energy (ATLAS-CONF-2011-043, 18 March 2011)

Figure 3: Event display of a six-jet event satisfying the analysis requirements. The towers in the bottom right figure represent transverse energy deposited in the calorimeter projected on a grid of eta and phi. eps, 5175kB png, 1063kB

Figure 3:
Event display of a six-jet event satisfying the analysis requirements. The towers in the bottom right figure represent transverse energy deposited in the calorimeter projected on a grid of eta and phi.
eps, 5175kB
png, 1063kB

A Search for Randall-Sundrum Gravitons Decaying to Photon Pairs in bs = 7 TeV pp Collisions (ATLAS-CONF-2011-044, 21 March 2011)

Figure 5: An event display of the highest invariant mass diphoton event in which both candidate photons satisfy the more stringent photon identification cuts. The highest transverse momentum photon has pT = 194 GeV and (eta, phi) = (-1.32,-0.44). The trailing photon has pT = 173 GeV and (eta, phi)= (1.10,2.82). The diphoton invariant mass is equal to 679 GeV. eps, 3426kB png, 399kB

Figure 5:
An event display of the highest invariant mass diphoton event in which both candidate photons satisfy the more stringent photon identification cuts. The highest transverse momentum photon has pT = 194 GeV and (eta, phi) = (-1.32,-0.44). The trailing photon has pT = 173 GeV and (eta, phi)= (1.10,2.82). The diphoton invariant mass is equal to 679 GeV.
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png, 399kB

Measurement of inclusive jet and dijet cross sections in proton-proton collision data at 7 TeV centre-of-mass energy using the ATLAS detector (ATLAS-CONF-2011-047, 20 March 2011)

Figure 28: Event display of Run 167607, Event 63115223. This shows the highest-pT jet collected during 2010, which has pT of 1.5 TeV. The two leading jets are central high-pT jets with an invariant mass of 2.8 TeV. They have (pT, y) of (1.5 TeV, -0.58) and (1.0 TeV, 0.44), respectively. The missing ET in the event is 310 GeV. png, 1397kB
Figure 29: Event display of Run 167607, Event 36526763. This shows one of the highest-energy jets collected during 2010, which is a jet in the FCal with energy of 3.37 TeV. This jet has pT of 120 GeV and y = -4.0. The energy that its constituent clusters deposit into each of the three FCal layers is shown at the top of the figure. The boundaries of the FCal at approximately +/-450 mm and +/-100 mm correspond to \|eta\| = 3.1 and \|eta\| = 4.9, respectively. png, 518kB
Figure 30: Event display of Run 167607, Event 40296085. This shows the highest-mass central dijet event collected during 2010, where the two leading jets have an invariant mass of 3.1 TeV. The two leading jets have (pT, y) of (1.3 TeV, -0.68) and (1.2 TeV, 0.64), respectively. The missing ET in the event is 46 GeV. png, 1302kB
Figure 31: Event display of Run 167607, Event 9435121. This shows the highest-mass dijet event collected during 2010, where the two leading jets in a forward-backward dijet system produce an invariant mass of 4.0 TeV. The two leading jets have (pT, y) of (510 GeV, -1.9) and (510 GeV, 2.2), respectively. The missing ET in the event is 31 GeV. png, 1271kB

A Search for New High-Mass Phenomena Producing Top Quarks with the ATLAS Experiment (ATLAS-CONF-2011-070, 6 May 2011)

Figure 6: Event display for a high-mass event ($m_{t\bar{t}} = 714$ GeV.) The main panel on the left shows the $r-\phi$ view (i.e. looking along the beam axis), and the top right panel is the $\eta-\phi$ view. The top quark boosts lead the decay products to be collimated, albeit still distinguishable using standard reconstruction algorithms. png, 342kB

Figure 6:
Event display for a high-mass event ($m_{t\bar{t}} = 714$ GeV.) The main panel on the left shows the $r-\phi$ view (i.e. looking along the beam axis), and the top right panel is the $\eta-\phi$ view. The top quark boosts lead the decay products to be collimated, albeit still distinguishable using standard reconstruction algorithms.
png, 342kB

Measurement of Jet Mass and Substructure for Inclusive Jets in sqrt(s) = 7 TeV pp Collisions with the ATLAS Experiment (ATLAS-CONF-2011-073, 20 May 2011)

Figure 20: Event 34533931 of Run 166658. Brief description: leptonic top candidate formed by high pT electron (145 GeV, 11 o’clock), moderate Emiss (1 o’clock), and the b-tagged jet at 12 o’clock. When reclustered with R = 1.0 it acquires a large pT , mass and 1 → 2 splitting scale as it absorbs the electron. Three jets between 4 and 6 o’clock are identified with the hadronic top quark. When reclustered with R = 1.0 the three jets merge into a single jet with mj = 197 GeV, sqrt(d12) = 110, sqrt(d23) = 40. Legend: jets indicated in red correspond to R = 0.4, jets in green to R = 1.0. png, 365kB
Figure 21: Event 106929590 of run 167576. Brief description: The leptonic top candidate is formed by the isolated muon at 2 o’clock, the Emiss separated by ∆φ = 0.27 rad and the b-tagged jet at 1 o’clock. A second muon reconstructed inside this jet corroborates the heavy flavour hypothesis. In the opposite φ hemisphere, between 7 and 8 o’clock, three jets are reconstructed with R = 0.4. The picture does not change with R = 0.6, but with R = 1.0 the three jets merge to form a single jet with a mass of 225 GeV. Legend: jets indicated in red correspond to R = 0.4, jets in green to R = 1.0. png, 367kB

Figure 20:
Event 34533931 of Run 166658. Brief description: leptonic top candidate formed by high pT electron (145 GeV, 11 o’clock), moderate Emiss (1 o’clock), and the b-tagged jet at 12 o’clock. When reclustered with R = 1.0 it acquires a large pT , mass and 1 → 2 splitting scale as it absorbs the electron. Three jets between 4 and 6 o’clock are identified with the hadronic top quark. When reclustered with R = 1.0 the three jets merge into a single jet with mj = 197 GeV, sqrt(d12) = 110, sqrt(d23) = 40. Legend: jets indicated in red correspond to R = 0.4, jets in green to R = 1.0.
png, 365kB

Figure 21:
Event 106929590 of run 167576. Brief description: The leptonic top candidate is formed by the isolated muon at 2 o’clock, the Emiss separated by ∆φ = 0.27 rad and the b-tagged jet at 1 o’clock. A second muon reconstructed inside this jet corroborates the heavy flavour hypothesis. In the opposite φ hemisphere, between 7 and 8 o’clock, three jets are reconstructed with R = 0.4. The picture does not change with R = 0.6, but with R = 1.0 the three jets merge to form a single jet with a mass of 225 GeV. Legend: jets indicated in red correspond to R = 0.4, jets in green to R = 1.0.
png, 367kB

Update of the Search for New Physics in the Dijet Mass Distribution in 163 pb^-1 of pp Collisions at sqrt(s) = 7 TeV Measured with the ATLAS Detector (ATLAS-CONF-2011-081, 1 June 2011)

Figure 6: The highest mass event passing our event selection. The dijet mass is 4040 GeV while the leading jets have (pT, eta, phi, color) of (1850 GeV, 0.32, 2.2, red) and (1840 GeV, -0.53, -0.92, green). eps, 6235kB png, 400kB
Figure 7: A high mass dijet event, with dijet mass 3360 GeV and leading jets with (pT, eta, phi, color) of (1640 GeV, 0.04, -2.7, green) and (1600 GeV, -0.35, 0.56, red). eps, 6235kB png, 428kB
Figure 8: A high mass dijet event, with dijet mass 3350 GeV and leading jets with (pT, eta, phi, color) of (1800 GeV, -0.51, -0.85, red) and (1470 GeV, -0.05, 2.4, green). eps, 6235kB png, 394kB
Figure 9: A high mass dijet event, with dijet mass 3320 GeV and leading jets with (pT, eta, phi, color) of (1590 GeV, -0.39, 0.31, red) and (1180 GeV, 0.88, -2.70, green). eps, 6235kB png, 383kB

Search for high-mass states with one muon plus missing transverse momentum in proton-proton collisions at sqrt(s)= 7 TeV with the ATLAS detector (ATLAS-CONF-2011-082, 2 June 2011)

Figure 2: Highest-mT event (mT = 1350 GeV) observed in data. Side (top left), end (top right) and three-dimensional (bottom left) views are shown. The muon (blue) has pT = 695 GeV and the missing ET (green) is 680 GeV. The recoiling jet has pT = 330 GeV. The bottom right detail shows the muon has all the expected hits. eps, 1155kB png, 1108kB

Figure 2:
Highest-mT event (mT = 1350 GeV) observed in data. Side (top left), end (top right) and three-dimensional (bottom left) views are shown. The muon (blue) has pT = 695 GeV and the missing ET (green) is 680 GeV. The recoiling jet has pT = 330 GeV. The bottom right detail shows the muon has all the expected hits.
eps, 1155kB
png, 1108kB

Search for high-mass dilepton resonances in pp collisions at sqrt(s) = 7 TeV with the ATLAS experiment (ATLAS-CONF-2011-083, 2 June 2011)

Figure 14: This event display is for the highest invariant mass dimuon event. The highest momentum muon has a pT of 270 GeV and an (eta, phi) of (1.56, 1.30). The subleading muon has a pT of 232 GeV and an (eta, phi) of (-0.09, -1.82). The invariant mass of the pair is 680 GeV. eps, 5419kB png, 926kB
Figure 15: This event display is for the highest invariant mass dielectron event. The highest energy electron has an ET of 390 GeV and an (eta, phi) of (-1.02, 0.86). The subleading electron has an ET of 388 GeV and an (eta, phi) of (0.19, -2.44). The invariant mass of the pair is 920 GeV. The event also contains a photon candidate with an ET of 36.5 GeV and an (eta, phi) of (-1.21, -0.82). eps, 4284kB png, 843kB

Figure 14:
This event display is for the highest invariant mass dimuon event. The highest momentum muon has a pT of 270 GeV and an (eta, phi) of (1.56, 1.30). The subleading muon has a pT of 232 GeV and an (eta, phi) of (-0.09, -1.82). The invariant mass of the pair is 680 GeV.
eps, 5419kB
png, 926kB

Figure 15:
This event display is for the highest invariant mass dielectron event. The highest energy electron has an ET of 390 GeV and an (eta, phi) of (-1.02, 0.86). The subleading electron has an ET of 388 GeV and an (eta, phi) of (0.19, -2.44). The invariant mass of the pair is 920 GeV. The event also contains a photon candidate with an ET of 36.5 GeV and an (eta, phi) of (-1.21, -0.82).
eps, 4284kB
png, 843kB

Search for squarks and gluinos using final states with jets and missing transverse momentum with the ATLAS detector in sqrt(s)=7TeV proton-proton collisions (ATLAS-CONF-2011-086, 3 June 2011)

Figure 9: A display of the reconstructed event with the highest meff found in the data sample used for this note. This event possesses four jets with pt > 40 GeV (pt = 636, 189, 96 and 81 GeV respectively), met = 547 GeV and meff =1548 GeV (calculated using the leading four jets). eps, 5935kB png, 1781kB

Figure 9:
A display of the reconstructed event with the highest meff found in the data sample used for this note. This event possesses four jets with pt > 40 GeV (pt = 636, 189, 96 and 81 GeV respectively), met = 547 GeV and meff =1548 GeV (calculated using the leading four jets).
eps, 5935kB
png, 1781kB

A Search for $t\bar{t}$ Resonances in the Lepton Plus Jets Channel using 200 pb$^{-1}$ of $pp$ Collisions at $\sqrt{s} = 7$ TeV (ATLAS-CONF-2011-087, 5 June 2011)

Figure 5: Event display for a high-mass event ($m_{t\bar{t}} = 1602$ GeV). The main panel on the top left shows the $r-\phi$ view, the bottom panel the $r-z$ view, and the middle right panel the calorimeter $\eta-\phi$ view.The top quark boosts lead the decay products to be collimated, albeit still mostly distinguishable using standard reconstruction algorithms. png, 602kB

Figure 5:
Event display for a high-mass event ($m_{t\bar{t}} = 1602$ GeV). The main panel on the top left shows the $r-\phi$ view, the bottom panel the $r-z$ view, and the middle right panel the calorimeter $\eta-\phi$ view.The top quark boosts lead the decay products to be collimated, albeit still mostly distinguishable using standard reconstruction algorithms.
png, 602kB

Search for New Phenomena in Monojet plus Missing Transverse Momentum Final States using 1 fb-1 of pp Collisions at sqrt(s)=7 TeV with the ATLAS Detector (ATLAS-CONF-2011-096, 18 July 2011)

Figure 8: Event display for one of the monojet candidates in the data. The event has a jet with pt = 602 GeV at eta = -1 and phi = 2.6, MET = 523 GeV, and no additional jet with ptjet > 30 GeV in the final state. eps, 2999kB png, 1467kB

Figure 8:
Event display for one of the monojet candidates in the data. The event has a jet with pt = 602 GeV at eta = -1 and phi = 2.6, MET = 523 GeV, and no additional jet with ptjet > 30 GeV in the final state.
eps, 2999kB
png, 1467kB

Measurement of the t-channel Single Top-Quark Production Cross Section in 0.70fb-1 of pp Collisions at sqrt(s) = 7 TeV with the ATLAS detector (ATLAS-CONF-2011-101, 20 July 2011)

Figure 10: Event display of an electron event with a high NN output value. The electron is shown in red, the b-tagged jet is in blue, the light quark jet is in yellow. E_T^miss is indicated by the dashed line in the x-y projection (upper right). The light quark jet is in the forward calorimeter and doesn't appear in the x-y projection. eps, 1477kB png, 1389kB

Figure 10:
Event display of an electron event with a high NN output value. The electron is shown in red, the b-tagged jet is in blue, the light quark jet is in yellow. E_T^miss is indicated by the dashed line in the x-y projection (upper right). The light quark jet is in the forward calorimeter and doesn't appear in the x-y projection.
eps, 1477kB
png, 1389kB

Measurement of the ZZ Production Cross Section in Proton-Proton Collisions at sqrt(s) = 7 TeV with the ATLAS Detector (ATLAS-CONF-2011-107, 21 July 2011)

Additional auxiliary plots
Figure 1: Event display of the ZZ->eeee candidate event (RunNumber 183216, Event Number 75692579). One Z candidate has a mass of 85.8 GeV and a pt of 27.2 GeV; it is formed by two electrons (in red) with {pt, eta, phi} of {56.0 GeV, -1.96, -2.14 rad} and {34.0 GeV, -1.97, 1.37 rad}, respectively. The other Z candidate has a mass of 111.2 GeV and a pt of 22.8 GeV; it is formed by two electrons (in green) with {pt, eta, phi} of {42.1 GeV, -1.31, 0.30 rad} and {23.5 GeV, 1.05, 3.02 rad}, respectively. The four lepton system has a mass of 270.9 GeV and a pt of 6.7 GeV. Inner detector tracks with a transverse momentum pt larger than 1 GeV are displayed as blue helices. png, 972kB
Figure 2: Event display of a ZZ->mumumumu candidate event (Run Number 183003, Event Number 121099951). One Z candidate has a mass of 84.4 GeV and a pt of 196.0 GeV, and it is formed by two muons (in red) with {pt, eta, phi} of {150.2 GeV, 0.55, 0.84 rad} and {47.1 GeV, 1.48, 0.56 rad}, respectively. The other Z candidate has a mass of 100.0 GeV and a pt of 403.4 GeV and it is formed by two muons (in green) with {pt, eta, phi} of {317.0 GeV, 0.63, -2.62 rad} and {90.4 GeV, 0.14, -2.28 rad}, respectively. The four lepton system has a mass of 597.0 GeV and a pt of 213.2 GeV. Inner detector tracks with a transverse momentum pt larger than 1 GeV are displayed as blue helices. png, 930kB
Figure 3: Three dimensional event display of a ZZ->mumumumu candidate event (Run Number 183003, Event Number 121099951). One Z candidate has a mass of 84.4 GeV and a pt of 196.0 GeV, and it is formed by two muons with {pt, eta, phi} of {150.2 GeV, 0.55, 0.84 rad} and {47.1 GeV, 1.48, 0.56 rad}, respectively. The other Z candidate has a mass of 100.0 GeV and a pt of 403.4 GeV and it is formed by two muons with {pt, eta, phi} of {317.0 GeV, 0.63, -2.62 rad} and {90.4 GeV, 0.14, -2.28 rad}, respectively. The four lepton system has a mass of 597.0 GeV and a pt of 213.2 GeV. Inner detector tracks with a transverse momentum pt larger than 1 GeV are displayed as blue helices. png, 981kB
Figure 4: Event display of a ZZ->eemumu candidate event (Run Number 182747, Event Number 63217197). One Z candidate has a mass of 85.9 GeV and a pt of 30.8 GeV and it is formed by two muons (in red) with {pt, eta, phi} of {44.9 GeV, 0.11, 0.69 rad} and {44.5 GeV, 0.53, -1.75 rad}, respectively. The other Z candidate has a mass of 85.5 GeV and a pt of 29.3 GeV, and it is formed by two electrons (in green) with {pt, eta, phi} of {39.6 GeV, 0.95, 1.19 rad} and {42.2 GeV, 1.85, -2.68 rad}, respectively. The four lepton system has a mass of 209.5 GeV and a pt of 4.6 GeV. Inner detector tracks with a transverse momentum pt larger than 1 GeV are displayed as blue helices. png, 971kB

Search for a heavy neutral particle decaying into an electron and a muon pair with intLdt=0.87fb^-1 in pp collisions at sqrts=7TeV with the ATLAS detector (ATLAS-CONF-2011-109, 19 July 2011)

Additional auxiliary plots
Figure 6: Event display for run 179804 event 71334854, the emu pair in this event gives the highest invariant mass. In this event, electron pT=341 GeV, eta=-1.17, phi=0.91; muon pT=216 GeV, eta=0.14, phi=-2.36; m_emu=662 GeV, dphi_emu=3.02 and MET=132 GeV. There is no jet with pT>30 GeV in this event. eps, 1992kB png, 1220kB

Search for heavy Majorana neutrino and W_R in dilepton plus jets events with the ATLAS detector in pp collisions at sqrt(s) = 7TeV (ATLAS-CONF-2011-115, 2 August 2011)

Figure 9: Event display of the highest $M_{llj}$ event in the OS dimuon channel. The highest momentum muon has a $p_T$ of 192~\GeV\ and an $(\eta,\phi)$ of $(-0.62,-2.81)$. The subleading muon has a $p_T$ of 28~\GeV\ and an $(\eta,\phi)$ of $(0.43,0.59)$. The jet has $p_T$ of 288~\GeV\ and an $(\eta,\phi)$ of $(0.40,0.57)$. The dimuon invariant mass is 218~\GeV, $M_{llj}=586$~\GeV\ and $S_{T}=509$~\GeV. eps, 960kB png, 435kB
Figure 10: Event display of the highest $M_{lljj}$ event in the OS dielectron channel. The highest energy electron has an $E_T$ of 301~\GeV\ and an $(\eta,\phi)$ of $(-0.78,1.40)$. The subleading electron has an $E_T$ of 266~\GeV\ and an $(\eta,\phi)$ of $(0.18,-0.96)$. The highest energy jet has $p_T$ of 118~\GeV\ and an $(\eta,\phi)$ of $(-0.66,-2.74)$. The subleading jet has $p_T$ of 50~\GeV\ and an $(\eta,\phi)$ of $(0.14,3.12)$. The dielectron invariant mass is 696~\GeV, $M_{lljj}=815$~\GeV\ and $S_{T}=739$~\GeV. eps, 1127kB png, 404kB
Figure 11: Event display of a SS dilepton candidate. The electron has an $E_T$ of 273~\GeV\ and an $(\eta,\phi)$ of $(-1.28,0.28)$. The presence of a close-by track near the electron track makes it a good candidate for a charge-flip reconstructed electron due to a hard bremsstrahlung. The subleading muon has a $p_T$ of 63~\GeV\ and an $(\eta,\phi)$ of $(0.36,3.12)$. The jet has $p_T$ of 159~\GeV\ and an $(\eta,\phi)$ of $(-1.39,2.88)$. The dilepton invariant mass is 353~\GeV\ and $M_{llj}=582$~\GeV. eps, 823kB png, 343kB

A Search for ttbar Resonances in the Dilepton Channel in 1.04 fb-1 of pp Collisions at sqrt(s) = 7 TeV (ATLAS-CONF-2011-123, 20 August 2011)

Figure 17: Event display of an event with high HT + ETmiss. The highest energy electron has an Et of 104 GeV, the subleading electron an Et of 35 GeV. The highest energy jet has an Et of 526 GeV, the subleading jet an Et of 339 GeV. The HT + ETmiss is 1226 GeV of which 222 GeV originates from ETmiss. eps, 3748kB png, 1171kB

Figure 17:
Event display of an event with high HT + ETmiss. The highest energy electron has an Et of 104 GeV, the subleading electron an Et of 35 GeV. The highest energy jet has an Et of 526 GeV, the subleading jet an Et of 339 GeV. The HT + ETmiss is 1226 GeV of which 222 GeV originates from ETmiss.
eps, 3748kB
png, 1171kB

Search for the Standard Model Higgs boson in the decay channel H to ZZ to llll with the ATLAS detector (ATLAS-CONF-2011-131, 21 August 2011)

Figure 5: Event display of a $4e$ candidate event with $m_{4l}=270.1\;\gev$. The masses of the lepton pairs are $85.0$ and $111.3\;\gev$ respectively. eps, 1925kB png, 935kB
Figure 6: Event display of a $4\mu$ candidate event with $m_{4l}=143.5\;\gev$. The masses of the lepton pairs are $90.6$ and $47.4\;\gev$ respectively. eps, 2037kB png, 910kB
Figure 7: Event display of a $2e2\mu$ candidate event with $m_{4l}=209.7\;\gev$. The masses of the lepton pairs are $85.9$ and $85.5\;\gev$ respectively. eps, 2596kB png, 1398kB

Observation of the χc1(1P) and χc2(1P) charmonium states in √s = 7 TeV pp collisions at the ATLAS experiment (ATLAS-CONF-2011-136, 25 August 2011)

Figure 5: Candidate χc → J/ψγ decay event in the ATLAS detector. Selected event properties include: Invariant masses M_μ+μ- = 3.15 GeV and M_μ+μ- γ = 3.55 GeV , J/ψ candidate with p_T = 18.0 GeV and η = 0.43 and photon candidate with p_T = 4.4 GeV and η = 0.41 eps, 6268kB png, 2547kB
Figure 6: Candidate χc → J/ψγ decay event in the ATLAS detector. Selected event properties include: Invariant masses M_μ+μ- = 3.07 GeV and M_μ+μ- γ = 3.46 GeV , J/ψ candidate with p_T = 17.2 GeV and η = 0.66 and photon candidate with p_T = 4.5 GeV and η = 0.64 eps, 6343kB png, 2430kB

Non-collision backgrounds as measured by the ATLAS detector during the 2010 proton-proton run (ATLAS-CONF-2011-137, 26 August 2011)

Figure 3: Event display of a typical BIB event, where a muon travelling almost parallel to the beam axis leaves a substantial energy deposit in the LAr calorimeter. eps, 2386kB png, 155kB

Figure 3:
Event display of a typical BIB event, where a muon travelling almost parallel to the beam axis leaves a substantial energy deposit in the LAr calorimeter.
eps, 2386kB
png, 155kB

Search for the Standard Model Higgs boson in the decay channel H->ZZ(*)->4l with 4.8 fb^-1 of pp collisions at sqrt(s) = 7 TeV (ATLAS-CONF-2011-162, 12 December 2011)

Figure 10a: Event display of a 4mu candidate event with m_4l=124.6 GeV. The masses of the lepton pairs are 89.7 GeV and 24.6 GeV. eps, 1650kB png, 1018kB
Figure 10b: Event display of a 4mu candidate event with m_4l=124.6 GeV. The masses of the lepton pairs are 89.7 GeV and 24.6 GeV. eps, 293kB png, 146kB
Figure 10c: Event display of a 4mu candidate event with m_4l=124.6 GeV. The masses of the lepton pairs are 89.7 GeV and 24.6 GeV. eps, 3385kB png, 1757kB
Figure 11a: Event display of a 2e2mu candidate event with m_4l=124.3 GeV. The masses of the lepton pairs are 76.8 GeV and 45.7 GeV. eps, 4295kB png, 2365kB
Figure 11b: Event display of a 2e2mu candidate event with m_4l=124.3 GeV. The masses of the lepton pairs are 76.8 GeV and 45.7 GeV. eps, 2857kB png, 523kB
Figure 11c: Event display of a 2e2mu candidate event with m_4l=124.3 GeV. The masses of the lepton pairs are 76.8 GeV and 45.7 GeV. eps, 8161kB png, 2791kB
Figure 12a: Event display of a 2mu2e candidate event with m_l=123.6 GeV. The masses of the lepton pairs are 89.3 GeV and 30.0 GeV. eps, 443kB png, 278kB
Figure 12b: Event display of a 2mu2e candidate event with m_l=123.6 GeV. The masses of the lepton pairs are 89.3 GeV and 30.0 GeV. eps, 977kB png, 482kB

2012

Search for high–mass dilepton resonances with 5 fb−1 of pp collisions at sqrt(s) = 7 TeV with the ATLAS experiment (ATLAS-CONF-2012-007, 1 March 2012)

Figure 7: Event display for the dielectron candidate with the highest reconstructed invariant mass m_ee =1.66 TeV ). Both electrons are in the calorimeter end-caps; their tracks are shown in green. The electron with highest transverse energy has an ET of 329 GeV and an (eta, phi) of (2.00, 1.02). The subleading electron has an ET of 217 GeV and an (eta, phi) of (-1.60, -1.83). The event missing transverse energy is 26 GeV. eps, 5293kB png, 429kB
Figure 8: Event display for the dimuon candidate with the highest reconstructed invariant mass m_mumu = 1.25 TeV). The muon with highest momentum has a pt of 648 GeV and an (eta, phi) of (-0.75, 0.49). The subleading muon has a pt of 583 GeV and an (eta, phi) of (-0.36, -2.60). The event missing transverse energy is 67 GeV, with a phi_MET of -2.83. eps, 2039kB png, 711kB

Figure 7:
Event display for the dielectron candidate with the highest reconstructed invariant mass m_ee =1.66 TeV ). Both electrons are in the calorimeter end-caps; their tracks are shown in green. The electron with highest transverse energy has an ET of 329 GeV and an (eta, phi) of (2.00, 1.02). The subleading electron has an ET of 217 GeV and an (eta, phi) of (-1.60, -1.83). The event missing transverse energy is 26 GeV.
eps, 5293kB
png, 429kB

Figure 8:
Event display for the dimuon candidate with the highest reconstructed invariant mass m_mumu = 1.25 TeV). The muon with highest momentum has a pt of 648 GeV and an (eta, phi) of (-0.75, 0.49). The subleading muon has a pt of 583 GeV and an (eta, phi) of (-0.36, -2.60). The event missing transverse energy is 67 GeV, with a phi_MET of -2.83.
eps, 2039kB
png, 711kB

Search for excited electrons and muons with 5/fb of propton-proton collisions at sqrt(s) = 7 TeV with the ATLAS detector (ATLAS-CONF-2012-008, 1 March 2012)

Figure 3: Display of the event containing the highest dielectron-photon invariant mass: 550 GeV. The pT of the electrons and photon are: 246, 223 and 74 GeV, respectively. The dielectron mass is 470 GeV, and the electron-photon invariant mass are = 101 GeV, and 264 GeV for the leading and subleading electrons, respectively. eps, 5191kB png, 1222kB
Figure 4: Display of the event containing the highest dimuon-photon invariant mass: 890 GeV. The pt of the muons and photon are: 91, 84 and 165 GeV, respectively. The dimuon mass is 165 GeV, and the muon-photon invariant mass are 721 GeV and 491 GeV for the leading and subleading muons, respectively. eps, 1423kB png, 738kB

Measurement of the total ZZ production cross section in the four-lepton channel using 4.7 fb−1 of ATLAS data (ATLAS-CONF-2012-026, 4 March 2012)

Figure 4: Event display of a ZZ->mumumumu candidate event (Run Number 183602, Event Number 282919). One Z candidate has a mass of 89.18 GeV and a pT of 36.04 GeV and it is formed by two muons with {pT ,eta, phi} of {61.60 GeV, -0.89, -2.11 rad} and {25.68 GeV, 0.09, 1.10 rad}, respectively. The other Z candidate has a mass of 88.03 GeV and a pT of 46.39 GeV and it is formed by two muons with {pT , eta, phi} of {42.69 GeV, -2.55, 1.39 rad} and {38.60 GeV, -1.23, -0.54 rad}, respectively. The four lepton system has a mass of 239.69 GeV and a pT of 21.99 GeV. png, 715kB

Figure 4:
Event display of a ZZ->mumumumu candidate event (Run Number 183602, Event Number 282919). One Z candidate has a mass of 89.18 GeV and a pT of 36.04 GeV and it is formed by two muons with {pT ,eta, phi} of {61.60 GeV, -0.89, -2.11 rad} and {25.68 GeV, 0.09, 1.10 rad}, respectively. The other Z candidate has a mass of 88.03 GeV and a pT of 46.39 GeV and it is formed by two muons with {pT , eta, phi} of {42.69 GeV, -2.55, 1.39 rad} and {38.60 GeV, -1.23, -0.54 rad}, respectively. The four lepton system has a mass of 239.69 GeV and a pT of 21.99 GeV.
png, 715kB

Search for squarks and gluinos using final states with jets and missing transverse momentum (ATLAS-CONF-2012-033, 12 March 2012)

Figure 39: A display of the reconstructed event with the highest m_eff found in the data sample used for this note. This event possesses four jets with p_T > 40 GeV (p_T = 974, 276, 146 and 61 GeV respectively), E^T_miss = 984 GeV and m_eff =2441 GeV (calculated using the leading four jets). eps, 16096kB png, 2111kB

Figure 39:
A display of the reconstructed event with the highest m_eff found in the data sample used for this note. This event possesses four jets with p_T > 40 GeV (p_T = 974, 276, 146 and 61 GeV respectively), E^T_miss = 984 GeV and m_eff =2441 GeV (calculated using the leading four jets).
eps, 16096kB
png, 2111kB

Further search for supersymmetry at sqrt(s) = 7 TeV in final states with jets, missing transverse momentum and one isolated lepton (ATLAS-CONF-2012-041, 16 March 2012)

Additional auxiliary plots
Figure 3: Event display of the muon event with the highest inclusive effective mass, passing the 3-jet selection. The pt of the three leading jets are: 615, 101 and 92 GeV. There is also a fourth jet with pt = 58 GeV. The muon pt is 74 GeV and Etmiss = 409 GeV. The inclusive effective mass is 1350 GeV. eps, 16469kB png, 3925kB
Figure 4: Event display of the electron event with the highest inclusive effective mass, passing the 4-jet selection. The pt of the four leading jets are: 690, 254, 117 and 84 GeV. There is also a fifth jet with pt = 36 GeV. The electron pt is 265 GeV and Etmiss = 381 GeV. The inclusive effective mass is 1827 GeV. eps, 12733kB png, 3818kB

Measurement of the Z boson Production in Lead-Lead Collisions at sqrt(s_NN)=2.76 TeV with the ATLAS Detector (ATLAS-CONF-2012-052, 26 May 2012)

Figure 8: ATLAS event display showing Z->ee candidate. FCal Sum ET = 0.42TeV (40-50\% Centrality), m_ee = 90.8GeV, pT of Z = 1.6GeV, yZ = -0.2. png, 273kB
Figure 9: ATLAS event display showing Z->ee + jet candidate. FCal Sum ET = 2.63TeV (5-10\% Centrality), m_ee = 78.1GeV, pT of Z = 81GeV, yZ = -1.9, pT of jet = 58GeV. png, 341kB
Figure 10: ATLAS event display showing Z->mumu + jet candidate. FCal Sum ET = 1.52TeV (20-30\% Centrality), m_mumu = 87.5GeV, pT of Z = 147GeV, yZ = -0.1, pT of jet = 142GeV. png, 323kB
Figure 11: ATLAS event display showing Z->ee candidate. FCal Sum ET = 1.58TeV (10-20\% Centrality), m_ee = 92.2GeV, pT of Z = 4.8GeV, yZ = -0.2. png, 1810kB
Figure 12: ATLAS event display showing Z->mumu candidate. FCal Sum ET = 2.16TeV (10-20\% Centrality), m_mumu = 102GeV, pT of Z = 5.0GeV, yZ = -0.1. png, 1265kB

A search for high mass resonances decaying to tau+tau- in the ATLAS detector (ATLAS-CONF-2012-067, 30 June 2012)

Figure 8: A high-M_T event observed in the τ_hτ_h analysis (Run 189822, Event 86849215), which features a highly-collimated 3-prong tau candidate back-to-back with a 1-prong tau candidate that punches through to the muon spectrometer. Both tau candidates deposit significant energy in the hadronic calorimeter and have very high tau identification scores. This suggests that this is a real ditau decay (eg. a high-mass Z/γ^*→τ_hτ_h event). eps, 692kB png, 5294kB
Figure 9: A high-M_T event observed in the μτ_h analysis (Run 191920, Event 25878131), which has a forward 1-prong tau candidate with p_T = 310 GeV, a forward muon with p_T = 340 GeV, and E_T^miss = 63 GeV. The combined M_T(μ, τ_h, E_T^miss) = 711 GeV. This event appears to be most likely a high-mass Z/γ^*→μτ_h event. The tau candidate deposits most of its energy in the hadronic end-cap calorimeter (HEC), with an EM-fraction of only 1.5%; consistent with a 1-prong tau candidate with no π⁰s. The track p_T = 300 GeV is consistent with the calorimeter measurement calibrated to give the tau p_T. The hadronic tau candidate was energetic enough to produce hits in a single end-cap MDT station (part of the muon spectrometer), however, it does not produce a muon candidate. This signature is consistent with high energy pion punch-through. png, 2584kB

Figure 8:
A high-M_T event observed in the τ_hτ_h analysis (Run 189822, Event 86849215), which features a highly-collimated 3-prong tau candidate back-to-back with a 1-prong tau candidate that punches through to the muon spectrometer. Both tau candidates deposit significant energy in the hadronic calorimeter and have very high tau identification scores. This suggests that this is a real ditau decay (eg. a high-mass Z/γ^*→τ_hτ_h event).
eps, 692kB
png, 5294kB

Figure 9:
A high-M_T event observed in the μτ_h analysis (Run 191920, Event 25878131), which has a forward 1-prong tau candidate with p_T = 310 GeV, a forward muon with p_T = 340 GeV, and E_T^miss = 63 GeV. The combined M_T(μ, τ_h, E_T^miss) = 711 GeV. This event appears to be most likely a high-mass Z/γ^*→μτ_h event. The tau candidate deposits most of its energy in the hadronic end-cap calorimeter (HEC), with an EM-fraction of only 1.5%; consistent with a 1-prong tau candidate with no π⁰s. The track p_T = 300 GeV is consistent with the calorimeter measurement calibrated to give the tau p_T. The hadronic tau candidate was energetic enough to produce hits in a single end-cap MDT station (part of the muon spectrometer), however, it does not produce a muon candidate. This signature is consistent with high energy pion punch-through.
png, 2584kB

Search for dark matter candidates and large extra dimensions in events with a photon and missing transverse momentum in pp collision data at sqrt(s)= 7 TeV with the ATLAS detector (ATLAS-CONF-2012-085, 1 July 2012)

Additional auxiliary plots
Figure 2: Event display of one monophoton candidate with ETmiss = 218.3 GeV, phi(ETmiss) = 2.52, a photon with pt = 218.0 GeV, eta(gamma) = 0.39, phi(gamma) = -0.68, and no jets in the final state. eps, 2190kB png, 1764kB
Figure 3: Event display of one monophoton candidate with ETmiss = 446.9 GeV, phi(ETmiss) = 2.55, a photon with pt = 449.7 GeV, eta(gamma) = -0.51, phi(gamma) = -0.65, and no jets in the final state. eps, 3483kB png, 2407kB

Search for New Phenomena in the Dijet Mass Distribution using 5.8 fb$^{-1}$ of $pp$ Collisions at $\sqrt{s}=8$~TeV collected by the ATLAS Detector (ATLAS-CONF-2012-088, 1 July 2012)

Figure 5: The highest-mass central dijet event with the highest-p_T jet collected by the end of June, 2012 (Event 34879440, Run 205113): the two central high-pT jets have an invariant mass of 4.1 TeV, and the highest-pT jet has a pT of 2.1 TeV, and the subleading jet has a p_T of 1.9 TeV. The missing ET$ and SumET for this event are respectively 63 GeV and 4.2 TeV. Only tracks with pT>400 MeV are displayed. The event was collected on June 18th, 2012. eps, 2460kB png, 6374kB

Figure 5:
The highest-mass central dijet event with the highest-p_T jet collected by the end of June, 2012 (Event 34879440, Run 205113): the two central high-pT jets have an invariant mass of 4.1 TeV, and the highest-pT jet has a pT of 2.1 TeV, and the subleading jet has a p_T of 1.9 TeV. The missing ET$ and SumET for this event are respectively 63 GeV and 4.2 TeV. Only tracks with pT>400 MeV are displayed. The event was collected on June 18th, 2012.
eps, 2460kB
png, 6374kB

Search for anomalous production of prompt like-sign lepton pairs with the ATLAS detector (ATLAS-CONF-2012-069, 2 July 2012)

Additional auxiliary plots
Figure 11: Event display of the ee event with the highest invariant mass (589 GeV). The electron tracks are shown in yellow and green, with the high mass like-sign pair having yellow tracks. The leading electron has an ET of 196 GeV, (η,φ) of (1.31,-1.86), and charge +1. The subleading electron has an ET of 50 GeV, (η,φ) of (-2.25,2.73), and charge +1. There is a third electron (shown as a green track) with an ET of 35 GeV, (η,φ) of (-0.54,1.73), and charge -1. There are two reconstructed jets. The leading jet has a pT of 207 GeV and (η,φ) of (0.59,1.49), and the subleading jet has a pT of 30 GeV and (η,φ) of (1.14,1.45). The missing transverse energy is 9 GeV with φ of -1.05. eps, 1310kB png, 937kB
Figure 12: Event display of the μμ event with the highest invariant mass (522 GeV). The muon tracks are shown in blue and red, with the high mass like-sign pair having red tracks. The leading muon has a pT of 486 GeV, (η,φ) of (0.13,-3.04), and charge +1. The subleading muon has a pT of 79 GeV, (η,φ) of (-1.73,-1.23), and charge +1. There is a third muon (shown as a blue track) with a pT of 32 GeV, (η,φ) of (-1.41,2.70), and charge -1. There are two reconstructed jets. The leading jet has a pT of 394 GeV and (η,φ) of (-0.64,0.17), and the subleading jet has a pT of 27 GeV and (η,φ) of (1.16,0.15). The missing transverse energy, shown as a green arrow, is 93 GeV with φ of 0.22. eps, 1067kB png, 984kB

Additional auxiliary plots

Figure 11:
Event display of the ee event with the highest invariant mass (589 GeV). The electron tracks are shown in yellow and green, with the high mass like-sign pair having yellow tracks. The leading electron has an ET of 196 GeV, (η,φ) of (1.31,-1.86), and charge +1. The subleading electron has an ET of 50 GeV, (η,φ) of (-2.25,2.73), and charge +1. There is a third electron (shown as a green track) with an ET of 35 GeV, (η,φ) of (-0.54,1.73), and charge -1. There are two reconstructed jets. The leading jet has a pT of 207 GeV and (η,φ) of (0.59,1.49), and the subleading jet has a pT of 30 GeV and (η,φ) of (1.14,1.45). The missing transverse energy is 9 GeV with φ of -1.05.
eps, 1310kB
png, 937kB

Figure 12:
Event display of the μμ event with the highest invariant mass (522 GeV). The muon tracks are shown in blue and red, with the high mass like-sign pair having red tracks. The leading muon has a pT of 486 GeV, (η,φ) of (0.13,-3.04), and charge +1. The subleading muon has a pT of 79 GeV, (η,φ) of (-1.73,-1.23), and charge +1. There is a third muon (shown as a blue track) with a pT of 32 GeV, (η,φ) of (-1.41,2.70), and charge -1. There are two reconstructed jets. The leading jet has a pT of 394 GeV and (η,φ) of (-0.64,0.17), and the subleading jet has a pT of 27 GeV and (η,φ) of (1.16,0.15). The missing transverse energy, shown as a green arrow, is 93 GeV with φ of 0.22.
eps, 1067kB
png, 984kB

Observation of an excess of events in the search for the Standard Model Higgs boson in the H-> ZZ(*)-> 4l channel with the ATLAS detector (ATLAS-CONF-2012-092, 5 July 2012)

Figure 29: Event display of a 4e candidate. EventNumber: 82614360 RunNumber: 203602 m_4l=124.6 GeV. m_12=70.6 GeV, m_34=44.7 GeV. e_1: pt=24.9 GeV, eta=-0.33, phi=1.98. e_2: pt=53.9 GeV, eta=-0.40, phi=1.69. e_3: pt=61.9 GeV, eta=-0.12, phi=1.45. e_4: pt=17.8 GeV, eta=-0.51, phi=2.84. eps, 906kB png, 885kB
Figure 30: Event display of a 4e candidate. EventNumber: 82614360 RunNumber: 203602 m_4l=124.6 GeV. m_12=70.6 GeV, m_34=44.7 GeV. e_1: pt=24.9 GeV, eta=-0.33, phi=1.98. e_2: pt=53.9 GeV, eta=-0.40, phi=1.69. e_3: pt=61.9 GeV, eta=-0.12, phi=1.45. e_4: pt=17.8 GeV, eta=-0.51, phi=2.84. png, 1424kB
Figure 31: Event display of a 4mu candidate. EventNumber: 82599793 RunNumber: 204769 m_4l=123.5 GeV. m_12=84 GeV, m_34=34.2 GeV. mu_1: pt=37.8 GeV, eta=0.61 phi=1.46. mu_2: pt=29.2 GeV, eta=-0.95, phi=-2.47. mu_3: pt=10.3 GeV, eta=0.62 phi=-1.41. mu_4: pt=32.6 GeV eta=-0.16, phi=2.85. eps, 966kB png, 1484kB
Figure 32: Event display of a 4mu candidate. EventNumber: 71902630 RunNumber: 204769 m_4l=125.1 GeV. m_12=86.3 GeV, m_34=31.6 GeV. mu_1: pt=36.1 GeV, eta=1.29, phi=1.33. mu_2: pt=47.5 GeV, eta=0.69, phi=-1.65. mu_3: pt=26.4 GeV, eta=0.47, phi=-2.51. mu_4: pt=71.7 GeV, eta=1.85, phi=1.65. eps, 903kB png, 1605kB
Figure 33: Event display of a 4mu candidate. EventNumber: 71902630 RunNumber: 204769 m_4l=125.1 GeV. m_12=86.3 GeV, m_34=31.6 GeV. mu_1: pt=36.1 GeV, eta=1.29, phi=1.33. mu_2: pt=47.5 GeV, eta=0.69, phi=-1.65. mu_3: pt=26.4 GeV, eta=0.47, phi=-2.51. mu_4: pt=71.7 GeV, eta=1.85, phi=1.65. png, 1989kB
Figure 34: Event display of a 2e2mu candidate. EventNumber: 12611816 RunNumber: 205113 m_4l=123.9 GeV. m_12=87.9 GeV, m_34=19.6 GeV. e_1: pt=18.7 GeV, eta=-2.45, phi=1.68,. e_2: pt=75.96 GeV, eta=-1.16, phi=-2.13. mu_3: pt=19.6 GeV, eta=-1.14, phi=-0.87. mu_4: pt=7.9 GeV, eta=-1.13, phi=0.94. png, 835kB

Observation of an excess of events in the search for the Standard Model Higgs boson in the gamma-gamma channel with the ATLAS detector (ATLAS-CONF-2012-091, 6 July 2012)

Figure 32: Event display of a diphoton event candidate where both photon candidates are unconverted. The event number is 56662314 and it was recorded during run 203779 at sqrt(s) = 8 TeV. The leading photon has eT = 62.2 GeV and eta = 0.39. The subleading photon has eT = 55.5 GeV and eta = 1.18. The measured diphoton mass is 126.9 GeV. The pT and pTt of the diphoton are 9.3 GeV and 6.5 GeV, respectively. Only reconstructed tracks with pT > 1 GeV, hits in the pixel and SCT layers and TRT hits with a high threshold are shown. eps, 9049kB png, 5151kB
Figure 33: Event display of a diphoton with a jet event candidate where both photon candidates are unconverted. The event number is 36443051 and it was recorded during run 203195 at sqrt(s) = 8 TeV. The leading photon has eT = 63.0 GeV and eta = 0.50. The subleading photon has eT = 56.1 GeV and eta = -0.96. The measured diphoton mass is 127.0 GeV. The pT and pTt of the diphoton are 83.9 GeV and 83.3 GeV, respectively. The jet has eT = 113 GeV and eta = -0.9. Only reconstructed tracks with pT > 1 GeV, hits in the pixel and SCT layers and TRT hits with a high threshold are shown. eps, 34188kB png, 3007kB
Figure 34: Event display of a diphoton with two jets event candidate where both photon candidates are converted. The event number is 24947130 and it was recorded during run 204769 at sqrt(s) = 8 TeV. The leading photon has eT = 80.1 GeV and eta = 1.01. The subleading photon has eT = 36.2 GeV and eta = -0.17. The measured diphoton mass is 126.9 GeV. The pT and pTt of the diphoton are 44.3 GeV and 6.2 GeV, respectively. The leading jet has eT = 120 GeV and eta = -2.9. The subleading jet has eT = 81 GeV and eta = 2.7. The measured two-jets mass is 1.6 TeV. The Delta phi between the diphoton system and the system of the two-jets is 2.9. Only reconstructed tracks with pT > 1 GeV, hits in the pixel and SCT layers and TRT hits with a high threshold are shown. eps, 5894kB png, 5322kB

Observation of an Excess of Events in the Search for the Standard Model Higgs Boson in the H -> WW -> l nu l nu Channel with the ATLAS Detector (ATLAS-CONF-2012-098, 18 July 2012)

Figure 21: Display of an event satisfying all the selection criteria for events in the H + 0 jet e+mu channel. The reconstructed lepton pT values are 33 and 29 GeV for the electron and the muon, respectively. The reconstructed METRel is 35 GeV and the mT is 94 GeV. eps, 4580kB png, 943kB

Figure 21:
Display of an event satisfying all the selection criteria for events in the H + 0 jet e+mu channel. The reconstructed lepton pT values are 33 and 29 GeV for the electron and the muon, respectively. The reconstructed METRel is 35 GeV and the mT is 94 GeV.
eps, 4580kB
png, 943kB

Search for Supersymmetry in Events with Large Missing Transverse Momentum, Jets, and at Least One Tau Lepton in 7 TeV Proton-Proton Collision Data with the ATLAS Detector (ATLAS-CONF-2012-112, 13 August 2012)

Figure 6: Event selected in the one-tau channel. The pT of the leading and sub-leading jets are 592 GeV (red) and 86 GeV (green) respectively. The selected tau pT is 32 GeV (orange). ETmiss is 478 GeV (red arrow). pdf, 955kB png, 2605kB
Figure 7: Event selected in the one-tau channel. The pT of the leading and sub-leading jets are 372 GeV (red) and 124 GeV (green) respectively. The selected tau pT is 66 GeV (orange). ETmiss is 324 GeV (red arrow). pdf, 950kB png, 2553kB
Figure 8: Event selected in the one-tau channel. The pT of the leading and sub-leading jets are 341 GeV (red) and 212 GeV (green) respectively. The selected tau pT is 109 GeV (orange). ETmiss is 577 GeV (red arrow). pdf, 598kB png, 2533kB
Figure 9: Event selected in the one-tau channel. The pT of the leading and sub-leading jets are 386 GeV (red) and 188 GeV (blue) respectively. The selected tau pT is 266 GeV (orange). ETmiss is 300 GeV (red arrow). pdf, 614kB png, 2526kB
Figure 10: Event selected in the two-tau channel. The pT of the leading and sub-leading jets are 466 GeV (red) and 131 GeV (green) respectively. The pT of the leading and sub-leading taus are 129 GeV and 22 GeV (orange) respectively. ETmiss is 452 GeV (red arrow). pdf, 1736kB png, 2709kB
Figure 11: Event selected in the tau+e channel. The pT of the leading and sub-leading jets are 548 GeV (red) and 448 GeV (green) respectively. The selected tau and electron pT are 22 GeV (orange) and 90 GeV (yellow). ETmiss is 68 GeV (red arrow). pdf, 1665kB png, 2851kB

Measurement of momentum imbalance in Z -> ll + jet events in Lead-Lead collisions at sqrt(s_NN)=2.76 TeV with the ATLAS detector (ATLAS-CONF-2012-119, 13 August 2012)

Figure 12: ATLAS event display showing a \zee\ + jet event candidate. FCal $\sum$\ET= 2.62\,\TeV (5--10\% Centrality), $m_{ee}$ = 87.5\,\GeV, \ptZ = 105\,\GeV, $p_{\mathrm{T}}^{\mathrm{jet (R=0.2)}}$ = 41.8\,\GeV. png, 411kB
Figure 13: ATLAS event display showing a $Z\rightarrow\mu\mu$ + jet event candidate. FCal $\sum$$E_{T}$= 2.14 TeV (10--20% Centrality), $m_{\mu\mu}$ = 92.5 GeV, $p_{\mathrm{T}}^{Z}$ = 102 GeV, $p_{\mathrm{T}}^{\mathrm{jet (R=0.2)}}$ = 46.3 GeV. png, 395kB

Search for ttZ production in the three lepton final state with 4.7 fb-1 of √s = 7 TeV pp collision data collected by the ATLAS detector (ATLAS-CONF-2012-126, 24 August 2012)

Figure 4: The only candidate event in data found in the signal region. The event is in the eμμ channel. The thick green line indicates the selected electron. The two thick red lines (with associated tracks highlighted in yellow) represent the selected muons. The dashed red line indicates the direction of the E_T^miss. The b-jets are highlighted with blue cones and all other jets with grey cones. The expected signal-to-background ratio in the signal region is 3.0, taking zero as the estimate of the fake lepton background. eps, 6235kB png, 793kB

Figure 4:
The only candidate event in data found in the signal region. The event is in the eμμ channel. The thick green line indicates the selected electron. The two thick red lines (with associated tracks highlighted in yellow) represent the selected muons. The dashed red line indicates the direction of the E_T^miss. The b-jets are highlighted with blue cones and all other jets with grey cones. The expected signal-to-background ratio in the signal region is 3.0, taking zero as the estimate of the fake lepton background.
eps, 6235kB
png, 793kB

Search for high-mass dilepton resonances in 6.1/fb of pp collisions at sqrt(s)= 8 TeV with the ATLAS experiment (ATLAS-CONF-2012-129, 13 September 2012)

Figure 5: Event display of the selected event with the highest dimuon invariant mass. The highest momentum muon has a pT of 289 GeV and an η of 1.54. The subleading muon has a pT of 274 GeV and an η of -1.35. The invariant mass of the pair is 1258 GeV. eps, 211kB png, 330kB

Figure 5:
Event display of the selected event with the highest dimuon invariant mass. The highest momentum muon has a pT of 289 GeV and an η of 1.54. The subleading muon has a pT of 274 GeV and an η of -1.35. The invariant mass of the pair is 1258 GeV.
eps, 211kB
png, 330kB

Search for Single Production of Vector-like Quarks Coupling to Light Generations in 4.64/fb1 of ATLAS Data at sqrt(s) = 7 TeV (ATLAS-CONF-2012-137, 24 September 2012)

Figure 7a: Event display for the $W\rightarrow e\nu$ channel event with the highest three body invariant mass. Here, the invariant mass of the three body system is $M(e, \nu, \rm{leading~jet})=1615~\gev$. eps, 2716kB png, 665kB
Figure 7b: Event display for the $W\rightarrow \mu\nu$ channel event with the highest three body invariant mass. Here, the invariant mass of the three body system is $M(\mu, \nu, \rm{leading~jet})=1598~\gev$. eps, 2630kB png, 516kB
Figure 7c: Event display for the $Z\rightarrow ee$ channel event with the highest three body invariant mass. Here, the invariant mass of the three body system is $M(e, e, \rm{leading~jet})=1859~\gev$. eps, 2626kB png, 578kB
Figure 7d: Event display for the $Z\rightarrow \mu\mu$ channel event with the highest three body invariant mass. Here, the invariant mass of the three body system is $M(\mu, \mu, \rm{leading~jet})=1380~\gev$. eps, 2769kB png, 351kB

Search for resonant ZZ production in the ZZ -> llqq channel with the ATLAS detector using 7.2 fb-1 of sqrt(s) = 8 TeV pp collision data (ATLAS-CONF-2012-150, 9 November 2012)

Figure 9: A representative event in the muon channel in the merged signal region where the three body invariant mass is found to be m(mu,mu,j) = 2.9 TeV. It should be noted that the leading jet in this event, shown as the larger cone, was reconstructed in the end cap of the hadronic calorimeter and therefore the energy deposits are not visible in the top left (x, y) view but can be seen in the bottom left and middle right views. eps, 34188kB png, 2362kB

Figure 9:
A representative event in the muon channel in the merged signal region where the three body invariant mass is found to be m(mu,mu,j) = 2.9 TeV. It should be noted that the leading jet in this event, shown as the larger cone, was reconstructed in the end cap of the hadronic calorimeter and therefore the energy deposits are not visible in the top left (x, y) view but can be seen in the bottom left and middle right views.
eps, 34188kB
png, 2362kB

Search for the Standard Model Higgs boson in H->tau+tau- decays in proton-proton collisions with the ATLAS detector (ATLAS-CONF-2012-160, 13 November 2012)

Additional auxiliary plots
Figure 3: Display of an event selected by the H→ τ_{lep}τ_{lep} analysis in the VBF category, where one τ decays to an electron and the other to a muon. The electron is indicated by a green track and the muon indicated by a red track. The dashed line represents the direction of the E_T^miss vector, and there are two VBF jets marked with turquoise cones. The muon p_T is 20 GeV, the electron p_T is 17 GeV, E_T^miss=43 GeV, m_jj=1610 GeV and m_MMC=126 GeV. eps, 11102kB png, 2111kB
Figure 7: Display of an event selected by the H→ τ_{lep}τ_{had} analysis in the VBF category, where one τ decays to a muon. The hadronically decaying τ lepton (1 prong decay) is indicated by a green track and the muon is indicated by a red track. The dashed line represents the direction of the E_T^miss vector, and there are two VBF jets marked with turquoise cones. The muon p_T is 63 GeV, the τ_{had} candidate p_T is 96 GeV, E_T^miss=119 GeV, m_jj=625 GeV and m_MMC=129 GeV. eps, 9421kB png, 1165kB
Figure 10: Display of an event selected by the H→ τ_{had}τ_{had} analysis in the VBF category. The τ_{had} candidates are indicated by green tracks. The dashed line represents the direction of the E_T^miss vector, and there are two VBF jets marked with turquoise cones. The transverse momenta of the τ_{had} candidates are 56 GeV and 49 GeV, E_T^miss=26 GeV, m_jj=408 GeV and m_MMC=131 GeV. eps, 10508kB png, 1748kB

Search for the Standard Model Higgs boson produced in association with a vector boson and decaying to bottom quarks with the ATLAS detector (ATLAS-CONF-2012-161, 13 November 2012)

Additional auxiliary plots
Figure 10: Display of a Higgs boson candidate event with zero selected leptons. The event contains two identified b-jets with transverse momenta of 193 GeV and 78 GeV, respectively, with an invariant mass of 123 GeV. The missing energy in the transverse plane is 271 GeV. eps, 20301kB png, 2867kB
Figure 11: Display of a Higgs boson candidate event with one selected lepton. The two identified b-jets have transverse momenta of 149 GeV and 86 GeV, respectively, with an invariant mass of 109 GeV. The identified muon has a transverse momentum of 96 GeV, the missing energy in the transverse plane is 139 GeV, resulting in a transverse momentum of the W boson candidate of 209 GeV. eps, 20301kB png, 1725kB
Figure 12: Display of a Higgs boson candidate event with two selected leptons. The two identified b-jets have transverse momenta of 70 GeV and 65 GeV, respectively, with an invariant mass of 122 GeV. The identified electrons have transverse momenta of 63 GeV and 54 GeV, respectively, resulting in a transverse momentum of the Z boson candidate of 115 GeV. eps, 20301kB png, 2398kB

Updated results and measurements of properties of the new Higgs-like particle in the four lepton decay channel with the ATLAS detector (ATLAS-CONF-2012-169, 13 December 2012)

Additional auxiliary plots
Figure 18: Event display of a 4e candidate. EventNumber: 82614360 RunNumber: 203602 m4ell=124.6 GeV. m12=70.6 GeV, m34=44.7 GeV. e1: pT,eta,phi=24.9 GeV,-0.33, 1.98. e2: pT,eta,phi= 53.9 GeV, -0.40, 1.69 . e3: pT,eta,phi= 61.9 GeV, -0.12, 1.45 . e4: pT,eta,phi=17.8 GeV,-0.51,2.84 . pT4ell= 100.8 GeV. ETmiss=11.0 GeV. eps, 906kB png, 885kB
Figure 19: Event display of a 4e candidate. EventNumber: 82614360 RunNumber: 203602 m4ell=124.6 GeV. m12=70.6 GeV, m34=44.7 GeV. e1: pT,eta,phi=24.9 GeV, -0.33, 1.98 . e2: pT,eta,phi=53.9 GeV, -0.40, 1.69. e3: pT,eta,phi=61.9 GeV, -0.12, 1.45 . e4: pT,eta,phi=17.8 GeV, -0.51, 2.84 . pT4ell= 100.8 GeV. ETmiss=11.0 GeV. eps, 20522kB png, 3070kB
Figure 20: Event display of a 4mu candidate. EventNumber: 82599793 RunNumber: 204769 m4ell=123.5 GeV. m12=84 GeV, m34=34.2 GeV. mu1: pT,eta,phi=37.8 GeV, 0.61 1.46 . mu2: pT,eta,phi=29.2 GeV, -0.95, -2.47. mu3: pT,eta,phi=10.3 GeV, 0.62 -1.41. mu4: pT,eta,phi=32.6 GeV -0.16, 2.85. pT4ell= 52.0 GeV. ETmiss=20.3 GeV. eps, 966kB png, 1484kB
Figure 21: Event display of a 4mu candidate. EventNumber: 71902630 RunNumber: 204769 m4ell=125.1 GeV. m12=86.3 GeV, m34=31.6 GeV. mu1: pT,eta,phi=36.1 GeV, 1.29, 1.33 . mu2: pT,eta,phi=47.5 GeV, 0.69, -1.65 . mu3: pT,eta,phi=26.4 GeV, 0.47, -2.51 . mu4: pT,eta,phi=71.7 GeV, 1.85, 1.65 . pT4ell= 27.0 GeV. ETmiss=41.8 GeV. eps, 903kB png, 1605kB
Figure 22: Event display of a 4mu candidate. EventNumber: 71902630 RunNumber: 204769 m4ell=125.1 GeV. m12=86.3 GeV, m34=31.6 GeV. mu1: pT,eta,phi=36.1 GeV, 1.29, 1.33 . mu2: pT,eta,phi=47.5 GeV, 0.69, -1.65 . mu3: pT,eta,phi=26.4 GeV, 0.47, -2.51 . mu4: pT,eta,phi=71.7 GeV, 1.85, 1.65 . pT4ell= 27.0 GeV. ETmiss=41.8 GeV. eps, 22222kB png, 3898kB
Figure 23: Event display of a 2e2mu candidate. EventNumber: 12611816 RunNumber: 205113 m4ell=123.9 GeV. m12=87.9 GeV, m34=19.6 GeV. e1: pT,eta,phi=18.7 GeV, -2.45, 1.68 . e2: pT,eta,phi=76.0 GeV, -1.16, -2.13 . mu3: pT,eta,phi=19.6 GeV, -1.14, -0.87 . mu4: pT,eta,phi=7.9 GeV, -1.13, 0.94 . pT4ell= 59.5 GeV. ETmiss=30.9 GeV. eps, 16334kB png, 1851kB
Figure 24: Event display of a 4mu candidate. RunNumber: 208123, EventNumber: 26433470. m4l=123.5 GeV, m12=73.7 GeV, m34=26.0 GeV. mu1: pT,eta,phi=64.12 GeV, 1.54, -0.013. mu2: pT,eta,phi=27.81 GeV, 0.025, -0.55 . mu3: pT,eta,phi=25.66 GeV, -0.13, 0.27 . mu4: pT,eta,phi=12.29 GeV, 0.87, 1.35 . pT4ell= 115.4 GeV. ETmiss=121.3 GeV. eps, 1005kB png, 1734kB
Figure 25: Event display of a 4mu candidate. RunNumber: 209736, EventNumber: 135745044. m4l=122.9 GeV, m12=92.2 GeV, m34=20.8 GeV. mu1: pT,eta,phi=73.19 GeV, 2.08, 0.14 . mu2: pT,eta,phi=27.16 GeV, 1.55, -2.90 . mu3: pT,eta,phi=14.61 GeV, 1.79, -2.49 . mu4: pT,eta,phi=12.90 GeV, 2.12, -0.82 . pT4ell= 45.3 GeV. ETmiss=39.8 GeV. eps, 773kB png, 1238kB