Event Displays from Run 2 physics analyses not included in publications

Simulated event of selectron pair production, with a mass of 500 GeV and lifetime of 1ns - SUSY-2018-14 [JHEP 10 (2020) 062]

Event display associated to Search for displaced leptons in √s=13 TeV pp collisions with the ATLAS detector. (Not in paper record)

Event display of a simulated event of selectron pair production, with a mass of 500 GeV and lifetime of 1ns, decaying into two displaced electrons. The clusters of energy in the calorimeter are shown as pink boxes. A selection of Inner-Detector tracks are shown in yellow. The reconstructed displaced electrons are shown as pink lines.

Higgsino candidate containing muon, electron, 6 jets, event 439589210 - SUSY-2019-04

Event display associated to Search for R-parity violating supersymmetry in a final state containing leptons and many jets with the ATLAS experiment using √s=13 TeV proton-proton collision data. (Not in paper record)

Display of an event recorded in 2017 (Run 331129, Event 439589210) from the higgsino signal region, containing a muon and electron with same electric charge, and 6 jets. The signal muon is indicated by the red line, and has transverse momentum pT = 35 GeV. The signal electron is indicated by the blue line, and has pT = 61 GeV. The pT of the 6 jets range from 41 GeV to 145 GeV . Among these jets, 4 are b-tagged, shown with a cyan cone. The missing transverse energy has a value of 31 GeV and is indicated by the dotted white line.

H->2e2μ candidate event recorded in 2017 (run=327636, event=1535020856) - HIGG-2016-25

Event display associated to Measurement of inclusive and differential cross sections in the H→ZZ∗→4ℓ decay channel in pp collisions at √s = 13 TeV with the ATLAS detector . (Not in paper record)

Display of a candidate Higgs boson event (run=327636, event=1535020856) from proton-proton collisions recorded by ATLAS in 2017 with LHC stable beams at a collision energy of 13 TeV. The candidate event is reconstructed in the 2e2μ final state. In the left display, the red lines show the path of the two muons including the hits in the muon spectrometer, the green lines show the paths of the two electrons together with the energy deposit in the electromagnetic calorimeter, and the violet cone is a jet. As shown in the lego plot on the right, the electrons have a transverse momentum of 46 and 33 GeV, the muons 25 and 8 GeV and the jet 37 GeV. (Note that the 25 GeV muon is behind the 46 GeV electron in the lego plot.) The invariant mass of the four lepton system is 125 GeV, the dielectron invariant mass is 91 GeV, the dimuon invariant mass is 31 GeV. The calorimeter energy deposits shown are required to be above 1 GeV.

H->2e2μ candidate event recorded in 2017 (run=328263, event=953423990) - HIGG-2016-25

Event display associated to Measurement of inclusive and differential cross sections in the H→ZZ∗→4ℓ decay channel in pp collisions at √s = 13 TeV with the ATLAS detector . (Not in paper record)

Display of a candidate Higgs boson event (run=328263, event=953423990) from proton-proton collisions recorded by ATLAS in 2017 with LHC stable beams at a collision energy of 13 TeV. The candidate event is reconstructed in the 2e2μ final state. In the left display, the red lines show the path of the two muons including the hits in the muon spectrometer, the green lines show the paths of the two electrons together with the energy deposit in the electromagnetic calorimeter. As shown in the lego plot on the right, the electrons have a transverse momentum of 34 and 27 GeV, the muons 24 and 9 GeV. The invariant mass of the four lepton system is 124 GeV, the dielectron invariant mass is 80 GeV, the dimuon invariant mass is 34 GeV. The calorimeter energy deposits shown are required to be above 1 GeV.

H->2e2μ candidate event with 25 additional reconstructed primary vertices recorded in 2016 - HIGG-2016-25

Event display associated to Measurement of inclusive and differential cross sections in the H→ZZ∗→4ℓ decay channel in pp collisions at √s = 13 TeV with the ATLAS detector . (Not in paper record)

A display of a candidate Higgs boson event from proton-proton collisions recorded by ATLAS with LHC stable beams at a collision energy of 13 TeV. The Higgs boson candidate is reconstructed in a beam crossing with 25 additionally reconstructed primary vertices from the minimum bias interactions. The candidate event is reconstructed in the 2µ2e final state. In the left display, the red lines show the path of the two muons including the hits in the muon spectrometer, the green lines show the paths of the two electrons together with the energy deposit in the electromagnetic calorimeter, and the yellow tracks are the remaining charged particles from the Higgs boson candidate vertex. No jet has been reconstructed with transverse momentum above 30 GeV. The grey tracks correspond to the charged particles from the 25 pileup vertices with transverse momentum above 0.5 GeV and the colored squares in the lower display correspond to the position of the reconstructed vertices. As shown in the lego plot on the right, the muons have a transverse momentum of 29 and 31 GeV, and the electrons 23 and 19 GeV . The invariant mass of the four lepton system is 119 GeV, the dimuon invariant mass is 69 GeV, the dielectron invariant mass is 42 GeV. This event falls within the standard mass selection window of 118 to 129 GeV and has a BDT discriminant response which gives a high probability that this event comes from a Higgs decay as opposed to a background ZZ* decay.

H->2e2μ candidate event with 25 additional reconstructed primary vertices recorded in 2016 - HIGG-2016-25

Event display associated to Measurement of inclusive and differential cross sections in the H→ZZ∗→4ℓ decay channel in pp collisions at √s = 13 TeV with the ATLAS detector . (Not in paper record)

A display of a candidate Higgs boson event from proton-proton collisions recorded by ATLAS with LHC stable beams at a collision energy of 13 TeV. The Higgs boson candidate is reconstructed in a beam crossing with 25 additionally reconstructed primary vertices from the minimum bias interactions. The candidate event is reconstructed in the 2µ2e final state. In the left display, the red lines show the path of the two muons including the hits in the muon spectrometer, the green lines show the paths of the two electrons together with the energy deposit in the electromagnetic calorimeter, and the yellow tracks are the remaining charged particles from the Higgs boson candidate vertex. No jet has been reconstructed with transverse momentum above 30 GeV. The grey tracks correspond to the charged particles from the 25 pileup vertices with transverse momentum above 1 GeV and the colored squares in the lower display correspond to the position of the reconstructed vertices. As shown in the lego plot on the right, the muons have a transverse momentum of 29 and 31 GeV, and the electrons 23 and 19 GeV . The invariant mass of the four lepton system is 119 GeV, the dimuon invariant mass is 69 GeV, the dielectron invariant mass is 42 GeV. This event falls within the standard mass selection window of 118 to 129 GeV and has a BDT discriminant response which gives a high probability that this event comes from a Higgs decay as opposed to a background ZZ* decay.

H->2e2μ candidate event with 25 additional reconstructed primary vertices recorded in 2016 - HIGG-2016-25

Event display associated to Measurement of inclusive and differential cross sections in the H→ZZ∗→4ℓ decay channel in pp collisions at √s = 13 TeV with the ATLAS detector . (Not in paper record)

A display of a candidate Higgs boson event from proton-proton collisions recorded by ATLAS with LHC stable beams at a collision energy of 13 TeV. The Higgs boson candidate is reconstructed in a beam crossing with 25 additionally reconstructed primary vertices from the minimum bias interactions. The candidate event is reconstructed in the 2µ2e final state. In the left display, the red lines show the path of the two muons including the hits in the muon spectrometer, the green lines show the paths of the two electrons together with the energy deposit in the electromagnetic calorimeter, and the yellow tracks are the remaining charged particles from the Higgs boson candidate vertex. No jet has been reconstructed with transverse momentum above 30 GeV. The grey tracks correspond to the charged particles from the 25 pileup vertices with transverse momentum above 2 GeV and the colored squares in the lower display correspond to the position of the reconstructed vertices. As shown in the lego plot on the right, the muons have a transverse momentum of 29 and 31 GeV, and the electrons 23 and 19 GeV . The invariant mass of the four lepton system is 119 GeV, the dimuon invariant mass is 69 GeV, the dielectron invariant mass is 42 GeV. This event falls within the standard mass selection window of 118 to 129 GeV and has a BDT discriminant response which gives a high probability that this event comes from a Higgs decay as opposed to a background ZZ* decay.

H->2e2μ candidate event with 25 additional reconstructed primary vertices recorded in 2016 - HIGG-2016-25

Event display associated to Measurement of inclusive and differential cross sections in the H→ZZ∗→4ℓ decay channel in pp collisions at √s = 13 TeV with the ATLAS detector . (Not in paper record)

A display of a candidate Higgs boson event from proton-proton collisions recorded by ATLAS with LHC stable beams at a collision energy of 13 TeV. The Higgs boson candidate is reconstructed in a beam crossing with 25 additionally reconstructed primary vertices from the minimum bias interactions. The candidate event is reconstructed in the 2µ2e final state. In the left display, the red lines show the path of the two muons including the hits in the muon spectrometer, the green lines show the paths of the two electrons together with the energy deposit in the electromagnetic calorimeter, and the yellow tracks are the remaining charged particles from the Higgs boson candidate vertex. No jet has been reconstructed with transverse momentum above 30 GeV. The grey tracks correspond to the charged particles from the 25 pileup vertices with transverse momentum above 4 GeV and the colored squares in the lower display correspond to the position of the reconstructed vertices. As shown in the lego plot on the right, the muons have a transverse momentum of 29 and 31 GeV, and the electrons 23 and 19 GeV . The invariant mass of the four lepton system is 119 GeV, the dimuon invariant mass is 69 GeV, the dielectron invariant mass is 42 GeV. This event falls within the standard mass selection window of 118 to 129 GeV and has a BDT discriminant response which gives a high probability that this event comes from a Higgs decay as opposed to a background ZZ* decay.

H->2e2μ candidate event with 25 additional reconstructed primary vertices recorded in 2016 - HIGG-2016-25

Event display associated to Measurement of inclusive and differential cross sections in the H→ZZ∗→4ℓ decay channel in pp collisions at √s = 13 TeV with the ATLAS detector . (Not in paper record)

A display of a candidate Higgs boson event from proton-proton collisions recorded by ATLAS with LHC stable beams at a collision energy of 13 TeV. The Higgs boson candidate is reconstructed in a beam crossing with 25 additionally reconstructed primary vertices from the minimum bias interactions. The candidate event is reconstructed in the 2µ2e final state. In the left display, the red lines show the path of the two muons including the hits in the muon spectrometer, the green lines show the paths of the two electrons together with the energy deposit in the electromagnetic calorimeter, and the yellow tracks are the remaining charged particles from the Higgs boson candidate vertex. No jet has been reconstructed with transverse momentum above 30 GeV. The grey tracks correspond to the charged particles from the 25 pileup vertices with transverse momentum above 8 GeV and the colored squares in the lower display correspond to the position of the reconstructed vertices. As shown in the lego plot on the right, the muons have a transverse momentum of 29 and 31 GeV, and the electrons 23 and 19 GeV . The invariant mass of the four lepton system is 119 GeV, the dimuon invariant mass is 69 GeV, the dielectron invariant mass is 42 GeV. This event falls within the standard mass selection window of 118 to 129 GeV and has a BDT discriminant response which gives a high probability that this event comes from a Higgs decay as opposed to a background ZZ* decay.

H->2e2μ candidate event recorded in 2015 (run=280862 event=53564866) - HIGG-2016-25

Event display associated to Measurement of inclusive and differential cross sections in the H→ZZ∗→4ℓ decay channel in pp collisions at √s = 13 TeV with the ATLAS detector . (Not in paper record)

Display of a candidate Higgs boson event from proton-proton collisions recorded by ATLAS with LHC stable beams at a collision energy of 13 TeV. The candidate event is reconstructed in the 2e2μ final state. The right display shows a projection in which only the phi coordinates of the particles and energy deposits are plotted, while the central display shows a 3-dimensional view. The path of the muons is indicated by the red lines, the electrons by the blue lines. The energy deposits in the electromagnetic calorimeter are shown in green, the deposits in the hadronic calorimeter in yellow. In addition to the four leptons, there are two back-to-back jets in the event, as shown by the cones. The electrons have a transverse momentum of 111 and 16 GeV, the muons 18 and 17 GeV, the jets 118 and 54 GeV . The invariant mass of the four lepton system is 129 GeV, the di-electron invariant mass is 91 GeV, the di-muon invariant mass is 29 GeV, the pseudorapidity difference between the two jets is 6.4 while the di-jet invariant mass is 2 TeV.

H->2e2μ candidate event recorded in 2015 (run=280862 event=53564866) - HIGG-2016-25

Event display associated to Measurement of inclusive and differential cross sections in the H→ZZ∗→4ℓ decay channel in pp collisions at √s = 13 TeV with the ATLAS detector . (Not in paper record)

Display of a candidate Higgs boson event from proton-proton collisions recorded by ATLAS with LHC stable beams at a collision energy of 13 TeV. The candidate event is reconstructed in the 2e2µ final state. In the left display, the red lines show the path of the two muons including the hits in the muon spectrometer, the green lines show the paths of the two electrons together with the energy deposit in the electromagnetic calorimeter, and the violet cones are two jets. As shown in the lego plot on the right,the electrons have a transverse momentum of 111 and 16 GeV, the muons 18 and 17 GeV, the jets 118 and 54 GeV . The invariant mass of the four lepton system is 129 GeV, the di-electron invariant mass is 91 GeV, the di-muon invariant mass is 29 GeV, the pseudorapidity difference between the two jets is 6.4 while the di-jet invariant mass is 2 TeV.

H->2e2μ candidate event recorded in 2015 (run=280464 event=517140616) - HIGG-2016-25

Event display associated to Measurement of inclusive and differential cross sections in the H→ZZ∗→4ℓ decay channel in pp collisions at √s = 13 TeV with the ATLAS detector . (Not in paper record)

Display of a candidate Higgs boson event from proton-proton collisions recorded by ATLAS with LHC stable beams at a collision energy of 13 TeV. The candidate event is reconstructed in the 2µ2e final state. The left display shows a projection in which only the phi coordinates of the particles and energy deposits are plotted, while the central display shows a 3-dimensional view. The path of the muons is indicated by the red lines, the electrons by the blue lines. The energy deposits in the electromagnetic calorimeter are shown in green, the deposits in the hadronic calorimeter in yellow. In addition to the four leptons, there is a jet in the event, as shown by the cone. The muons have a transverse momentum of 55 and 33 GeV, the electrons 14 and 11 GeV and the jet 31 GeV. The invariant mass of the four lepton system is 123 GeV, the di-muon invariant mass is 91 GeV and the di-electron invariant mass is 27 GeV.

H->2e2μ candidate event recorded in 2015 (run=280464 event=517140616) - HIGG-2016-25

Event display associated to Measurement of inclusive and differential cross sections in the H→ZZ∗→4ℓ decay channel in pp collisions at √s = 13 TeV with the ATLAS detector . (Not in paper record)

Display of a candidate Higgs boson event from proton-proton collisions recorded by ATLAS with LHC stable beams at a collision energy of 13 TeV. The candidate event is reconstructed in the 2µ2e final state. In the left display, the red lines show the path of the two muons including the hits in the muon spectrometer, the green lines show the paths of the two electrons together with the energy deposit in the electromagnetic calorimeter, and the violet cone is a jet. As shown in the lego plot on the right, the muons have a transverse momentum of 55 and 33 GeV, the electrons 14 and 11 GeV and the jet 31 GeV. The invariant mass of the four lepton system is 123 GeV, the di-muon invariant mass is 91 GeV and the di-electron invariant mass is 27 GeV.

Candidate H→bb decay event with two b-tag jets and no lepton recorded in 2015 - ATLAS-CONF-2017-041

Event display associated to Evidence for the H→bb decay with the ATLAS detector. (not in CONF record)

A 2-tag, 2-jet, 0-lepton event within the signal-like portion of the high p_T^V region BDTVH (Run 284213, Event 1927020336) is shown. The E_T^Miss, shown as a white dashed line, has a magnitude of 294.3 GeV. The two central high-p_T b-tagged jets are shown as green and yellow bars corresponding to the energy deposition in the electromagnetic and hadronic calorimeters respectively. The dijet invariant mass of 136.9 GeV. Tracks with p_T above 1 GeV are shown.Tracks in both jets form signatures compatible with the decay of a b-hadron. The BDTVH output is 0.67. The excerpt shows three vertices and their associated tracks (with a p_T cut of 1.5 GeV): the yellow circle represents the primary vertex and the two light blue circles the two secondary vertices compatible with the presence of b-decays.

Candidate H→bb decay event with two b-tag jets and no lepton recorded in 2015 - ATLAS-CONF-2017-041

Event display associated to Evidence for the H→bb decay with the ATLAS detector. (not in CONF record)

A 2-tag, 2-jet, 0-lepton event within the signal-like portion of the high p_T^V region BDTVH (Run 284213, Event 1927020336) is shown. The E_T^Miss, shown as a white dashed line, has a magnitude of 294.3 GeV. The two central high-p_T b-tagged jets are shown as green and yellow bars corresponding to the energy deposition in the electromagnetic and hadronic calorimeters respectively. The dijet invariant mass of 136.9 GeV. Tracks in both jets form signatures compatible with the decay of a b-hadron. The BDTVH output is 0.67.

Candidate H→μμ decay recorded in 2015 - HIGG-2016-10 [arXiv:1705.04582].

Event display associated to Search for the dimuon decay of the Higgs boson in pp collisions at √s = 13 TeV with the ATLAS detector. - arXiv:1705.04582 (not in paper record)

H→μμ candidate event (run 281411, event 312608026) recorded in 2015. - HIGG-2016-10

Event display associated to Search for the dimuon decay of the Higgs boson in pp collisions at √s = 13 TeV with the ATLAS detector. - arXiv:1705.04582 (not in paper record)

Display of a candidate Higgs-boson event decaying to two muons, H→μμ, from proton-proton collisions recorded by ATLAS in 2015 at a collision energy of 13 TeV (run 281411, event 312608026). The event contains two muons (red tracks) with invariant mass m(μ,μ)=124 GeV and two forward jets (yellow cones) with invariant mass m(jet,jet)=1237 GeV. The jet on the left is associated with energy deposits in the forward calorimeter, rendered as dark green boxes in front of the jet. The jet on the right is reconstructed from energy deposits in the electromagnetic endcap calorimeter, rendered as light green boxes, and visible inside the semi-transparent jet cone.

Candidate heavy Higgs boson decaying to two tau leptons, in association with a b-jet - HIGG-2016-12 [JHEP 01 (2018) 055].

Event display associated to Search for additional heavy neutral Higgs and gauge bosons in the ditau final state produced in 36/fb of pp collisions at sqrt(s) = 13 TeV with the ATLAS detector (not in paper record)

Display of event 264472429 of run 302393 showing a candidate of a heavy Higgs particle produced in association with a b-jet (red jet cone) with p_T(b-jet)=47 GeV. The decay is into a pair of oppositely charged tau leptons (blue jet cones) with p_T^tau1=292 GeV and p_T^tau2=275 GeV. Both tau leptons decay hadronically into three charged particles. The 2nd tau (tau2) also has significant energy deposition in the electromagnetic calorimeter indicating a neutral pion decay into two photons. The direction of missing transverse momentum E_T^miss of 33 GeV is indicated by the white dotted line in the transverse plane view. The total transverse mass m_T^tot = sqrt( (p_T^tau1 + p_T^tau2+E_T^miss)² - (p_T^tau1 + p_T^tau2 + E_T^miss)²) = 591 GeV, where p_T^tau1, p_T^tau2 and E_T^miss are vectors in the transverse plane. Tracks with momentum larger than 4 GeV are shown as green lines.

Candidate W' → WH in the semileptonic mode [ATLAS-CONF-2021-026].

Event display associated to Search for heavy resonances decaying into a W boson and a Higgs boson in final states with leptons and b-jets in 139 fb−1 of pp collisions at 13 TeV with the ATLAS detector (not in paper record)

Display of an event recorded in 2018 (Run 363710, Event 2531279786) from a candidate W+H event of invariant mass 3.7 TeV falling into the one b-tag merged signal region. The W boson candidate is comprised of the signal muon and missing transverse energy, where the signal muon is indicated by the red line and has transverse momentum p_T = 631.6 GeV and the missing transverse energy has a value of 361.8 GeV and is indicated by the dotted white line. The Higgs boson candidate is comprised of the large-R jet matched to one b-tag, which is indicated by the cyan cone and has transverse momentum p_T = 1.09 TeV. The yellow blocks correspond to energy depositions in the hadronic calorimeter and blue boxes to muon chambers with hits from the signal muon.

Z->μμ candidate event with 17 vertices recorded in 2017.

Event display is associated to no paper.

A display of a Z->μμ candidate event from proton-proton collisions recorded by ATLAS with LHC stable beams at a collision energy of 13 TeV on 19th June 2017 (Run 327265, Event 117236869). The Z candidate is reconstructed in a beam crossing with 16 additionally reconstructed vertices from minimum bias interactions. The two muons have p _T =31.7 GeV and 28.5 GeV. The invariant mass of the two muons is 91.8 GeV. The left display presents a transverse view of the event (X-Y plane) where the red lines show the two muons' paths. The right display zooms into the interaction region and shows a fraction of the 17 reconstructed vertices. The hard interaction vertex is represented by a red ellipse (on the left of the insert) from which the two muons (red tracks) are emerging. The bottom display presents the event in longitudinal view (Z-Y plane).

W-boson produced in association with a top quark in the di-lepton channel candidate event recorded in 2015.

Event display is associated to no paper.

Display of event 1220033035 in run 284285 recorded by ATLAS in proton-proton collisions with LHC stable beams at a centre-of-mass energy of 13 TeV on November 1st, 2015. The topology of this candidate corresponds to the production of a W boson in association with a single top quark in the dilepton channel. Two opposite charged leptons are reconstructed. The reconstructed electron represented by the blue line has a transverse momentum around 32 GeV, being close to the beam pipe. The reconstructed muon, with a transverse momentum around 38 GeV, is represented by the red line. The green and yellow bars indicate energy deposits in the liquid argon and scintillating-tile calorimeters, from these deposits one jet is identified and represented by an azure cone. This central jet, with a transverse momentum around 36 GeV, is identified as having originated from a b-quark. The missing transverse momentum represented by the dotted white line has a magnitude around 57 GeV.

W candidate event decaying to one muon and one neutrino, recorded in 2011.

Event display is associated to no paper.

Display of a candidate event for a W boson decaying into one muon and one neutrino from proton-proton collisions recorded by ATLAS with LHC stable beams at a collision energy of 7 TeV. The muon (red line) has a transverse momentum of 32.8 GeV and the missing transverse energy is 52.4 GeV (cyan blue line), resulting in a transverse mass of 82.9 GeV of the di-lepton system. Little hadronic activity is measured, indicating a small transverse momentum of the W boson candidate. The event was recorded in June 2011 and was used for the measurement of the W boson mass.

Event details: Run Number 183081, Event Number 101291517, η _muon = 0.48, φ _muon = -0.08, P_T^muon= 32.8 GeV, M_T= 82.9 GeV, E_T^miss=52.4 GeV.

Dijet event collected in 2017, with m_jj=9.3 TeV.

Event display is associated to no paper.

Display of a di-jet event (Run=329716, Event=8575822452) with m_jj=9.3 TeV, produced in pp collisions at √s = 13 TeV data in 2017. The two high-p_T jets both have p_T=2.9 TeV, one is at η=-1.2 (magenta) and the other at η=0.9 (cyan). The view of the event in the plane transverse to the beam direction is shown on the left side. The top-right figure represents the calorimeter clusters transverse energies in the η-φ plane. The bottom-right figure present the event in the longitudinal view (Z-Y plane).

Dijet event collected in 2017, with m_jj=9.3 TeV.

Event display is associated to no paper.

Display of a di-jet event (Run=329716, Event=8575822452) with m_jj=9.3 TeV, produced in pp collisions at √s = 13 TeV data in 2017. The two high-p_T jets both have p_T=2.9 TeV, one is at η=-1.2 and the other at η=0.9. The two yellow cone represent the reconstructed jets.

Top-antiptop candidate event reconstructed with one electron, one muon and two b-tag jets, recorded in 2016.

Event display is associated to no paper.

Display of a candidate top-antitop event from proton-proton collisions recorded by ATLAS with LHC stable beams at a collision energy of 13 TeV. The candidate event is reconstructed in the electron, muon and 2 b-tag jets final state, which p_T are 228 and 154 GeV. The path of the muon is indicated by the red line, the electron by the blue line. The energy deposits in the electromagnetic calorimeter are shown in green, the deposits in the hadronic calorimeter in yellow. The jets are represented by the two yellow cones. The bottom left insert presents a zoom on the proton-proton interaction region. The golden dots represent hits in the four layers of the pixel detector. The inner most layer (the insertable B layer) is at a radius of 3.34 cm from the beam line. The white disks represent primary vertices, and the azure ones vertices compatible with a B-decay.

Top-antiptop candidate event reconstructed with one electron, one muon and two b-tag jets, recorded in 2016.

Event display is associated to no paper.

Display of a candidate top-antitop event from proton-proton collisions recorded by ATLAS with LHC stable beams at a collision energy of 13 TeV. The candidate event is reconstructed in the electron, muon and 2 b-tag jets final state, which p_T are 228 and 154 GeV. The path of the muon is indicated by the red line, the electron by the blue line. The jets are represented by the two yellow cones. The white disks represent primary vertices, and the azure ones vertices compatible with a B-decay. Primary vertices are represented by a white dot and vertices compatible with the decay of B-meson by an azure dot.

Top-antiptop candidate event reconstructed with one electron, one muon and one soft p_T muon associated to a b-tag jet, recorded in 2016.

Event display is associated to no paper.

Event display of a ttbar dilepton candidate event from proton-proton collisions recorded by ATLAS with LHC stable beams at a collision energy of 13 TeV. In addition to two prompt leptons (an electron of 107 GeV and a muon of 268 GeV) a soft muon (7 GeV) is associated to a b-jet candidate (in dR<0.4) tagged by the new BDT-based Soft Muon Tagger algorithm. The light blue lines reaching the Muon Spectrometer (MS) show the path of the two combined muons and the hits in the MS are in red; the electron energy deposit in the electromagnetic calorimeter is showed in green. The red arrow shows the missing transverse energy (181 GeV).

Top-antiptop candidate event reconstructed with one electron, one muon and one soft p_T muon associated to a b-tag jet, recorded in 2016.

Event display is associated to no paper.

Event display of a ttbar dilepton candidate event from proton-proton collisions recorded by ATLAS with LHC stable beams at a collision energy of 13 TeV. In addition to two prompt leptons (an electron of 107 GeV and a muon of 268 GeV) a soft muon (7 GeV) is associated to a b-jet candidate (in dR<0.4) tagged by the new BDT-based Soft Muon Tagger algorithm. Zoom on the reconstructed primary vertex (PV, two tracks) and secondary vertex (SV, six tracks) in the Z-rho plane. The track of the muon within the jet tagged by new BDT-based SMT b-tagging algorithm is showed in red. The distance between PV and SV is about 2 mm.

Top-antiquark candidate event with a muon, an electron and three jets, recorded in 2015.

Event display is associated to no paper.

Display of a ttbar candidate event from proton-proton collisions recorded by ATLAS with LHC stable beams at a collision energy of 13 TeV. The red line shows the path of a muon with transverse momentum around 140 GeV through the detector. The green line shows the path of an electron with transverse momentum around 170 GeV through the detector. The green and yellow bars indicate energy deposits in the liquid argon and scintillating-tile calorimeters, from these deposits 3 jets are identified with transverse momenta between 30 and 80 GeV. Two of the jets are identified as having originated from b-quarks. Tracks reconstructed from hits in the inner tracking detector are shown as arcs curving in the solenoidal magnetic field. (from the Top group public results page)

A high resolution version is available here.

Top-antiquark candidate event with a muon and four jets, recorded in 2015.

Event display is associated to no paper.

Display of a ttbar candidate event from proton-proton collisions recorded by ATLAS on 4 June 2015, with LHC stable beams at a collision energy of 13 TeV. The red line shows the path of a muon with transverse momentum around 35 GeV through the detector. The green and yellow bars indicate energy deposits in the liquid argon and scintillating-tile calorimeters, from these deposits 4 jets are identified with transverse momenta between 25 and 80 GeV. Tracks reconstructed from hits in the inner tracking detector are shown as arcs curving in the solenoidal magnetic field. (from the Top group public results page)

A high resolution version is available here.

Candidate event for a t-channel single top-quark production in the muon plus jets channel, recorded in 2015.

Event display is associated to no paper.

Display of event 279124678 in run 267073 recorded by ATLAS in proton-proton collisions with LHC stable beams at a centre-of-mass energy of 13 TeV on June 5th, 2015. The topology of this candidate corresponds to t-channel single top-quark production in the muon plus jets channel. The reconstructed muon represented by the red line has a transverse momentum around 30 GeV through the detector. The green and yellow bars indicate energy deposits in the liquid argon and scintillating-tile calorimeters, from these deposits 2 jets are identified and represented by yellow cones. The central jet, with a transverse momentum around 50 GeV, is identified as having originated from a b-quark. The forward jet, with a transverse momentum around 30 GeV is closer to the beam pipe. The missing transverse momentum represented by the dotted white line has a magnitude around 40 GeV. (from the Top group public results page)

A high resolution version is available here.

Boosted top quark pair candidate event recorded in 2015.

Event display is associated to no paper.

Display of a candidate boosted top quark pair production event from proton-proton collisions recorded by ATLAS with LHC stable beams at a collision energy of 13 TeV. The red line shows the path of a muon with transverse momentum around 50 GeV through the detector. The dashed line shows the direction of the missing transverse momentum, which has a magnitude of about 470 GeV. The green and yellow bars indicate energy deposits in the liquid argon and scintillating-tile calorimeters, from these deposits 4 small-radius (R=0.4) jets are identified with transverse momenta between 70 and 300 GeV. Three of these small-radius jets are re-clustered into the leading large-radius (R=1.0) jet (not shown explicitly) with a transverse momentum of about 600 GeV and a jet mass of about 180 GeV, near the top quark mass. One of these three jets in addition to the fourth jet above 70 GeV are identified as having originated from b-quarks. Tracks reconstructed from hits in the inner tracking detector are shown as arcs curving in the solenoidal magnetic field. (from the Top group public results page)

Four-top candidate from 2018 - TOPQ-2018-05

Event display associated to Evidence for tt¯tt¯ production in the multilepton final state in proton-proton collisions at √s = 13 TeV with the ATLAS detector (not in paper record)

Event display of a candidate four-top-quark event (Run 349114, Event 1280053930) with seven jets (four of them are b-tagged); two of the top quarks decay leptonically (one with a resulting muon, shown in red, and one with an electron, shown in green), and two top quarks decay hadronically. Green rectangles correspond to energy deposits in cells of the electromagnetic calorimeter, while yellow rectangles correspond to energy deposits in cells of the hadron calorimeter. The jets (b-tagged jets) are shown as yellow (blue) cones. The direction of the missing transverse momentum is indicated by a dotted line.

B_s->J/ψφ candidate event recorded in 2017 - ATLAS-CONF-2019-009

Event display associated to Measurement of the CP violation phase ϕs in Bs→J/ψϕ decays in ATLAS at 13 TeV (not in paper record)

Event display of a B_s meson candidate decaying to J/ψφ where the J/ψ meson decays to two oppositely charged muons (illustrated by the red lines) and the φ meson decays to two oppositely charged kaons (illustrated by the blue curves). The event (run=333181, event=1942573294) was recorded by ATLAS with LHC stable beams with proton-proton collisions at a collision energy of 13 TeV on 16th August 2017.

B_s->μ μ candidate event recorded in 2016 (Run 302137, event 1093131714).

Event display associated to Study of the rare decays of B0s and B0 mesons into muon pairs using data collected during 2015 and 2016 with the ATLAS detector (not in paper record)

Event display of a B_s meson candidate decaying to two oppositely charged muons (illustrated by the red lines), recorded by ATLAS with LHC stable beams with proton-proton collisions at a energy of 13 TeV on 16 June 2016 (Run 302137, event 1093131714). The blue and green boxes represent the TGC barrel and endcap muon chambers, fired by the two muons, and the purple sectors are RPC endcap muon detectors. The yellow and green bars represent the energy deposited in the hadronic and electromagnetic calorimeters. The upper right inset shows the proton-beam colliding region with reconstructed charged particle tracks (lines), primary vertices (pink dots) and the two muons (red lines), fitted into the secondary vertex (about 3 mm apart from the primary vertex). The lower inset is a zoomed region of the B_s->μ μ candidate vertex. The ellipses show the fitted dimuon vertex (large pink ellipse) and the associated primary vertex (small pink ellipse on the lower left). The areas of the ellipses correspond to the 3 sigma uncertainties from the fits.

Event display of simulated Hidden Sector signal sample at a centre-of-mass energy of 13 TeV

Event display is associated to no paper.

Event display of simulated Hidden Sector (HS) signal sample for the CalRatio displaced jets analysis at a centre-of-mass energy of 13 TeV. This event display shows an HS heavy neutral boson Φ [1000 GeV] decaying to a pair of long-lived particles s [400 GeV], which then each decay to two Standard Model fermions f and fbar. The analysis searches for two long-lived particles decaying in the Hadronic Calorimeter (HCAL) or at the edge of the Electromagnetic calorimeter (ECAL), which results in two jets with no tracks pointing to them and most of the energy deposited in the HCAL, represented by yellow and orange cells, and little energy in the ECAL, which is represented by blue and green cells. The two fermions decaying from each long-lived particle only produce one jet due to their collimation, giving rise to two such jets in the event. Only tracks with transverse momentum over 2 GeV are shown.

Search for new heavy particles decaying into dielectron final states, full Run 2 dataset - ATLAS-CONF-2019-001

Event display associated to ATLAS-CONF-2019-001 (not in CONF record)

Event display of the dielectron candidate with the highest invariant mass in the 2015-18 data taking period with mee = 4.06 TeV. The properties of the leading electron are ET = 2.01 TeV, η = 0.47 and φ = -0.78. The properties of the subleading electron are ET = 1.92 TeV, η = -0.03 and φ = 2.37. The analysis searched for new heavy particles decaying into dilepton final states.

Search for new heavy particles decaying into dimuon final states, full Run 2 dataset - ATLAS-CONF-2019-001

Event display associated to ATLAS-CONF-2019-001 (not in CONF record)

Event display of the dimuon candidate with the highest invariant mass in the 2015-18 data taking period with mμμ = 2.75 TeV. The properties of the leading muon are pT = 1.82 TeV, η = -0.52 and φ = -0.56. The properties of the subleading muon are pT = 1.04 TeV, η = -0.67 and φ = 2.53. The jets that are overlapping with the muons have pT < 50 GeV and are thus most probably induced by the calorimeter deposits of the muon. The dimuon mass resolution is about 15% at 2.75 TeV. The analysis searched for new heavy particles decaying into dilepton final states.

Monojet event recorded in 2017 (Event = 2546139368, Run = 337215) - EXOT-2018-06

Event display associated to Search for new phenomena in events with an energetic jet and missing transverse momentum in pp collisions at s√=13 TeV with the ATLAS detector (not in paper record)

A monojet event with jet p_T = 1924 GeV and E_T^miss = 1913 GeV collected in the 2017 ATLAS dataset (Event = 2546139368, Run = 337215). No additional jets with p_T above 30 GeV are found. Green and yellow bars correspond to the energy depositions in the electromagnetic and hadronic calorimeters, respectively. The missing transverse momentum is shown as the red dashed line on the opposite side of the detector.

Event display (run 365914, event 562492194) of a back-to-back electron-muon pair in an ultra-peripheral collision recorded with the ATLAS detector during the 2018 Pb+Pb data-taking period - 14^th November 2018.

Event display is associated to no paper.

Event display (run 365914, event 562492194) of a back-to-back electron-muon pair in an ultra-peripheral collision recorded with the ATLAS detector during the 2018 Pb+Pb data-taking period. A total of two tracks are reconstructed, one corresponding to the electron and the other the muon. The electron – shown in green – deposits in the electromagnetic calorimeter. The muon – shown in red – leaves less energy in the calorimeters, but is also observed in the muon spectrometer. The electron is measured to have positive charge and a transverse momentum of 11.9 GeV, and the muon is negatively charged with a transverse momentum of 11.7 GeV. In the transverse plane, the pair has an acoplanarity of 0.0132. All calorimeter cells with a transverse energy above 500 MeV are shown.

Event display (run 365681, event 1064766274) of an ultra-peripheral photo-nuclear collision recorded by the ATLAS detector during 2018 Pb+Pb collision period - 11^th November 2018.

Event display is associated to no paper.

Event display (run 365681, event 1064766274) of an ultra-peripheral photo-nuclear collision recorded by the ATLAS detector during 2018 Pb+Pb collision period. The event topology includes large rapidity gaps between calorimeter energy deposits as well as asymmetry in the total transverse energy in the forward calorimeters (71 GeV left, 0.9 GeV right). 71 tracks were measured above 400 MeV in transverse momentum, and are colored based on their charge. The total energy in the forward calorimeters is displayed in green.

Event display (run 366011, event 999067412) with an unbalanced high-p_T photon+jet pair, from Pb-Pb collisions - 15^th November 2018

Event display is associated to no paper.

Display of an event (run 366011, event 999067412) containing an unbalanced, high-p_T photon+jet pair. The event was recorded with the ATLAS high level trigger during the 2018 Pb+Pb collision period. The event has a total of 3.74 TeV measured in the forward calorimeters, corresponding to a centrality percentile of 4%. The photon has 420 GeV of transverse momentum, passes the tight identification criteria, and is isolated. The jet, with a p_T of 289 GeV, does not balance the photon in the transverse plane.

Event display (run 365573, event 400666938) with three high-p_T jets, from Pb-Pb collisions - 10th November 2018

Event display is associated to no paper.

Event display (run 365573, event 400666938) with three high-p_T jet event recorded during the 2018 Pb+Pb run at center-of-mass energy of 5.02 TeV. In this event, the leading 415 GeV jet is azimuthally balanced by the two smaller sub-leading jets (230 and 207 GeV). A total of 0.5 TeV of transverse energy was deposited in the forward calorimeters, corresponding to a centrality percentile of approximately 50%.

Display of a candidate event (run 365512, event 130954442) gamma-gamma-> e⁺e^- from Pb-Pb collisions - 9th November 2018

Event display is associated to no paper.

Event display (run 365512, event 130954442) for an exclusive $\gamma\gamma\rightarrow ee$ candidate in ultra-peripheral collision in 2018 Pb+Pb dataset, recorded on 9th of November 2018 at 07:56:44. Two back-to-back electrons (p_T^e1 = 8.2 GeV and p_T^e2 = 7.4 GeV) with an invariant mass of 16 GeV are presented. All charged-partice tracks with p_T > 100 MeV are shown. All calorimeter cells with various E_T thresholds are shown: E_T > 250 MeV for EMB, EMEC and Tile, E_T > 800 MeV for HEC, and E_T > 1000 MeV for FCAL.

Display of a photon-jet event (run 365602, event 855982997) from Pb-Pb collisions - 10th November 2018

Event display is associated to no paper.

Display of an event (run 365602, event 855982997) with an azimuthally balanced pair of high-p_T photon and jet, taken using the high-level photon trigger during the 2018 Pb+Pb data taking at the centre-of-mass energy of 5.02 TeV. The photon is isolated, passes tight identification criteria, and has p_T = 211 GeV. The balancing jet has a p_T of 200 GeV, deposited in both the electromagnetic and hadronic calorimeters. A total of 1.37 TeV of transverse energy is deposited in the forward calorimeters, which corresponds approximately to a centrality percentile of 30%. 

Event display (run 365512, event 110420355) fromPb-Pb collisions (stable beam) - 9th November 2018

Event display is associated to no paper.

Event display (run 365512, event 110420355) from lead-lead collision data recorded with the ATLAS detector on 9 November 2018 with stable beams. Orange, green, and cyan boxes indicate energy deposits in the calorimeter systems. Orange lines indicate the trajectories of charged particles recorded by the inner detector tracking systems.

Event display (run 365512, event 110420355) fromPb-Pb collisions (stable beam) - 9th November 2018

Event display is associated to no paper.

Event display (run 365512, event 110420355) from lead-lead collision data recorded with the ATLAS detector on 9th November 2018 with stable beams. Curved colored lines show the trajectories of charged particles in the inner detector tracking systems. Yellow boxes indicate energy deposits in the calorimeter systems. The top right plot shows the distribution of energy deposited in the calorimeters, demonstrating the high particle multiplicity of the event.

Event display (run 365276, event 342956912) from Pb-Pb collisions - 6th November 2018

Event display is associated to no paper.

Event display from PbPb collisions recorded in ATLAS on 6 November 2018, during the startup of the 2018 LHC heavy ion program. Colored lines show the trajectories of charged particles in the tracking systems. Yellow boxes indicate energy depositions in the calorimeter systems. The event was recorded during the first 2018 fill with Pb-Pb collisions, when beams were not declared stable; therefore the voltage of the silicium detectors (pixels and SCT) was not at nominal value.

Event display (run 338037, event 657472305) from Xenon-Xenon collisions - 12-13 October 2017

Event display is associated to no paper.

Event display (run 338037, event 657472305) from the xenon-xenon collision run of 12-13 October 2017. Curved cyan lines show the trajectories of charged particles in the tracking systems. The bottom right plot shows the distribution of energy deposited in the calorimeters, demonstrating the high particle multiplicity of the event. Two muon candidates are reconstructed at high pseudorapidity, as seen in the bottom left plot.

Event display (run 338037, event 808999132) from Xenon-Xenon collisions - 12-13 October 2017

Event display is associated to no paper.

Event display (run 338037, event 808999132) from the xenon-xenon collision run of 12-13 October 2017. Curved white lines show the trajectories of charged particles in the tracking systems. The bottom right plot shows the distribution of energy deposited in the calorimeters, demonstrating the high particle multiplicity of the event.

Event Display of a simulated Ζ->μμ event with three different pile-up conditions (μ=2,50,140).

Event display is associated to no paper.

A simulated Ζ->μμ event at a centre-of-mass energy of 13 TeV overlaid with pile-up conditions expected at μ=2 average collisions per bunch crossing. The Run-2 simulation and reconstruction were used. Tracks with p_T > 500 MeV are displayed. The muon tracks are coloured in red.

Event Display of a simulated Ζ->μμ event with three different pile-up conditions (μ=2,50,140).

Event display is associated to no paper.

A simulated Ζ->μμ event at a centre-of-mass energy of 13 TeV overlaid with pile-up conditions expected at μ=50 average collisions per bunch crossing. The Run-2 simulation and reconstruction were used. Tracks with p_T > 500 MeV are displayed. The muon tracks are coloured in red.

Event Display of a simulated Ζ->μμ event with three different pile-up conditions (μ=2,50,140).

Event display is associated to no paper.

A simulated Ζ->μμ event at a centre-of-mass energy of 13 TeV overlaid with pile-up conditions expected at μ=140 average collisions per bunch crossing. The Run-2 simulation and reconstruction were used. Tracks with p_T > 500 MeV are displayed. The muon tracks are coloured in red.

Event Display of a simulated Ζ->μμ event with three different pile-up conditions (μ=2,50,140).

Event display is associated to no paper.

A simulated Ζ->μμ event at a centre-of-mass energy of 13 TeV overlaid with pile-up conditions expected at μ=2, 50, 140 average collisions per bunch crossing. The Run-2 simulation and reconstruction were used. Tracks with p_T > 500 MeV are displayed. The muon tracks are coloured in red. Animation that cycles tthrough all three pile-up scenarios.

Ζ->μμ candidate event with 65 additional reconstructed primary vertices recorded in 2017.

Event display is associated to no paper.

A display of a Z->μμ candidate event from proton-proton collisions recorded by ATLAS with LHC stable beams at a collision energy of 13 TeV on the 29th of September 2017 (Run 336852, Event 883966264). The Z boson candidate is reconstructed in a beam crossing with 65 additionally reconstructed vertices from minimum bias interactions. The two muons have P_T^μ =61.5 GeV and 60 GeV. The invariant mass of the two muons is 87 GeV. Calorimeter cells with E_T > 500 MeV are shown. The upper left display presents a transverse view of the event (X-Y plane) where the yellow lines show the two muons' paths. The upper right display shows the 66 reconstructed vertices. The bottom display presents the event in longitudinal view (Z-Y plane). Tracks with P_T >100 MeV are displayed.

Ζ->μμ candidate event with 65 additional reconstructed primary vertices recorded in 2017.

Event display is associated to no paper.

A display of a Z->μμ candidate event from proton-proton collisions recorded by ATLAS with LHC stable beams at a collision energy of 13 TeV on the 29th of September 2017 (Run 336852, Event 883966264). The Z boson candidate is reconstructed in a beam crossing with 65 additionally reconstructed vertices from minimum bias interactions. The two muons have P_T^μ =61.5 GeV and 60 GeV. The invariant mass of the two muons is 87 GeV. Tracks with P_T >100 MeV are displayed.

Ζ->μμ candidate event with 65 additional reconstructed primary vertices recorded in 2017.

Event display is associated to no paper.

A display of a Z->μμ candidate event from proton-proton collisions recorded by ATLAS with LHC stable beams at a collision energy of 13 TeV on the 29th of September 2017 (Run 336852, Event 883966264). The Z boson candidate is reconstructed in a beam crossing with 65 additionally reconstructed vertices from minimum bias interactions. The two muons have P_T^μ =61.5 GeV and 60 GeV. The invariant mass of the two muons is 87 GeV. The three panels, from top to bottom, show tracks with a cut on track P_T of 100 MeV, 1 GeV and 5 GeV respectively.

Ζ->μμ candidate event with 28 additional reconstructed primary vertices recorded in 2018.

Event display is associated to no paper.

A display of a candidate Ζ boson event (run 349114, event number 216445472) from proton-proton collisions recorded by ATLAS with LHC stable beams at a collision energy of 13 TeV. The Ζ boson candidate is reconstructed in a beam crossing with 28 additionally reconstructed primary vertices from the minimum bias interactions. The candidate event is reconstructed in the 2µ final state. In the left display, the red lines show the path of the two muons including the hits in the muon spectrometer and the yellow tracks are the remaining charged particles from the 29 vertices, with transverse momentum above 0.5 GeV. The colored squares in the lower display correspond to the position of the reconstructed vertices. The invariant mass of the two muons is 92.3 GeV.

Ζ->μμ candidate event with 28 additional reconstructed primary vertices recorded in 2018.

Event display is associated to no paper.

A display of a candidate Ζ boson event (run 349114, event number 216445472) from proton-proton collisions recorded by ATLAS with LHC stable beams at a collision energy of 13 TeV. The Ζ boson candidate is reconstructed in a beam crossing with 28 additionally reconstructed primary vertices from the minimum bias interactions. The candidate event is reconstructed in the 2µ final state. This display is a zoom of the inner detector; the red lines show the path of the two muons including the hits in the muon spectrometer and the yellow tracks are the remaining charged particles from the 29 vertices, with transverse momentum above 0.5 GeV. The white circles in the center of the display correspond to the position of the reconstructed vertices. The invariant mass of the two muons is 92.3 GeV.

Z->μμ candidate event with 25 vertices recorded in 2017.

Event display is associated to no paper.

A display of a Z->μμ candidate event from proton-proton collisions recorded by ATLAS with LHC stable beams at a collision energy of 13 TeV on 25th September 2017 (Run 336567, Event 190582407). The Z candidate is reconstructed in a beam crossing with 24 additionally reconstructed vertices from minimum bias interactions. The two muons have P_T^μ=46.5 GeV and 34.3 GeV. The invariant mass of the two muons is 91.1 GeV. The left display presents a transverse view of the event (X-Y plane) where the red lines show the two muons' paths. The right display zooms into the interaction region and shows a fraction of the 25 reconstructed vertices. The hard interaction vertex is represented by a green square from which the two muons (red tracks) are emerging. The bottom display presents the event in longitudinal view (Z-Y plane). Tracks with p_T > 500 MeV are displayed.

Z->μμ candidate event with 25 vertices recorded in 2017.

Event display is associated to no paper.

A display of a Z->μμ candidate event from proton-proton collisions recorded by ATLAS with LHC stable beams at a collision energy of 13 TeV on 25th September 2017 (Run 336567, Event 190582407). The Z candidate is reconstructed in a beam crossing with 24 additionally reconstructed vertices from minimum bias interactions. The two muons have P_T^μ=46.5 GeV and 34.3 GeV. The invariant mass of the two muons is 91.1 GeV. The display is a zoom into the interaction region and shows a fraction of the 25 reconstructed vertices. The hard interaction vertex is represented by a green square from which the two muons (red tracks) are emerging. Tracks with p_T > 500 MeV are displayed.

Two Z->μμ candidate events associated to two vertices recorded in 2017.

Event display is associated to no paper.

ATLAS 2017 collision data event with two Z-boson candidates each decaying to two muons and originating from well separated pp interactions in the same LHC bunch crossing. The Z candidates have invariant mass of 91 GeV and 81 GeV, respectively, with muon transverse momenta of 40.7, 31.4 GeV and 45.6, 38.7 GeV. The production vertices of the two Z boson candidates are separated by 67 mm.

Two Z->μμ candidate events associated to two vertices recorded in 2017.

Event display is associated to no paper.

ATLAS 2017 collision data event with two Z-boson candidates each decaying to two muons and originating from well separated pp interactions in the same LHC bunch crossing. The Z candidates have invariant mass of 91 GeV and 81 GeV, respectively, with muon transverse momenta of 40.7, 31.4 GeV and 45.6, 38.7 GeV. The production vertices of the two Z boson candidates are separated by 67 mm.

Beam splash event recorded on 6th April 2018.

Event display is associated to no paper.

The image shows a visualization of experimental data coming from the 'beam splash' tests run in April 2018 as part of the restart process of the LHC accelerator, after the winter break for maintenance. The image shows the hits of part of the tracking detector (in red, at the center), the energy deposits in the electromagnetic calorimeter (in green), and those in the hadronic calorimeter (in yellow). The semi-transparent azure volumes are part of the hadronic calorimeter, while the grey outer structure is part of the muon spectrometer.

ATLAS collision event from the first LHC fill with stable beam on 17th April 2018.

Event display is associated to no paper.

Event display (run 348197, event 562578) from the first stable beam proton-proton collision run of 2018, recorded on April 17. Curved white lines show the trajectories of charged particles in the tracking systems.

ATLAS collision event from the first LHC fill with stable beam on 17th April 2018.

Event display is associated to no paper.

Event display (run 348197, event 921894) from the first stable beam proton-proton collision run of 2018, recorded on April 17. Orange lines show the trajectories of charged particles in the tracking systems. The green and yellow boxes show the energy deposits in the electromagnetic and hadronic calorimeters, respectively. The three yellow cones show jets of particles produced in the collision.