|
|
|||||||||||||
DownloadLo resolution |
First 900 GeV Candidate Collision Events, November 23rd, 2009
We recorded on Monday, November 23rd, the first few hundred candidate collision events. Below a picture of the first selected candidate event from the online event scanning. Display of a candidate collision event showing tracks in the Inner Detector. Photo #: atlas2009-collision-atlantis-140541-171897-new |
DownloadLo resolution |
First 900 GeV Candidate Collision Events, November 23rd, 2009
We recorded on Monday, November 23rd, the first few hundred candidate collision events. Below a picture of the first selected candidate event from the online event scanning. 3D display of the previous candidate collision event. Photo #: atlas2009-collision-vp1-140541-171897-new |
DownloadLo resolution |
First 900 GeV Collision Events in Stable-Beam Conditions with Inner Detector Fully Powered, December 6, 2009
On Sunday morning, Dec 6, 2009, the LHC achieved for the first time 900 GeV collisions under stable-beam conditions. This allowed ATLAS to fully ramp the high voltage of the inner most pixel and silicon-strip tracking detectors. The following displays show events from run 141749 taken during this period. Event display of a muon candidate, measured in the ATLAS muon spectrometer. Note that the toroidal magnetic field, bending the muon tracks in the z projection, is turned off for this run so that the muons follow a straight line path. Photo #: atlas2009-collision-vp1-141749-171059-muon-web |
DownloadLo resolution |
First 900 GeV Collision Events in Stable-Beam Conditions with Inner Detector Fully Powered, December 6, 2009
On Sunday morning, Dec 6, 2009, the LHC achieved for the first time 900 GeV collisions under stable-beam conditions. This allowed ATLAS to fully ramp the high voltage of the inner most pixel and silicon-strip tracking detectors. The following displays show events from run 141749 taken during this period. Display of event showing the electromagnetic and hadronic calorimeters. Only hits on tracks are displayed here. Photo #: atlas2009-collision-atlantis-141749-406601-web |
DownloadLo resolution |
First 900 GeV Collision Events in Stable-Beam Conditions with Inner Detector Fully Powered, December 6, 2009
On Sunday morning, Dec 6, 2009, the LHC achieved for the first time 900 GeV collisions under stable-beam conditions. This allowed ATLAS to fully ramp the high voltage of the inner most pixel and silicon-strip tracking detectors. The following displays show events from run 141749 taken during this period. Display of a collision event showing tracks in the Inner Detector system. Photo #: atlas2009-collision-atlantis-141749-405315-hits-web |
DownloadLo resolution |
First 2.36 TeV Collision Events recorded, December 8th, 2009
On Tuesday evening, December 8th, 2009, the LHC achieved for the first time 2.36 TeV collisions and ATLAS recorded their first events at this record energy. Display of a 2-jet event recorded at 2.36 TeV. The jets have ET of 23.2 GeV and 16.2 GeV, their eta is 2.06 and 1.43, respectively. Photo #: JiveXML_142065_116969-RZ-LegoPlot-YX-2009-12-08-22-52-41-web |
DownloadLo resolution |
First 900 GeV Candidate Collision Events, November 23rd, 2009
We recorded on Monday, November 23rd, the first few hundred candidate collision events. Below a picture of the first selected candidate event from the online event scanning. 3D display of the same candidate collision event, showing the measured energies in the calorimeter. Photo #: atlas2009-collision-vp1-140541-171897-new-lego |
DownloadLo resolution |
First 900 GeV Candidate Collision Events, November 23rd, 2009
We recorded on Monday, November 23rd, the first few hundred candidate collision events. Below a picture of the first selected candidate event from the online event scanning. Display of a another candidate collision event showing tracks in the Inner Detector. Photo #: atlas2009-atlantis-140541-184417-web |
DownloadLo resolution |
First 900 GeV Candidate Collision Events, November 23rd, 2009
We recorded on Monday, November 23rd, the first few hundred candidate collision events. Below a picture of the first selected candidate event from the online event scanning. 3D display of a candidate 2 jet event. Photo #: atlas2009-vp1-140541-416712-2jet-web |
DownloadLo resolution |
First 900 GeV Candidate Collision Events, November 23rd, 2009
We recorded on Monday, November 23rd, the first few hundred candidate collision events. Below a picture of the first selected candidate event from the online event scanning. Display of the same candidate 2 jet event, showing the measured energies in the calorimeter. Photo #: atlas2009-atlantis-140541-416712-2jet-web |
DownloadLo resolution |
First 900 GeV Collision Events in Stable-Beam Conditions with Inner Detector Fully Powered, December 6, 2009
On Sunday morning, Dec 6, 2009, the LHC achieved for the first time 900 GeV collisions under stable-beam conditions. This allowed ATLAS to fully ramp the high voltage of the inner most pixel and silicon-strip tracking detectors. The following displays show events from run 141749 taken during this period. Another display of the same 2 jet event showing different projections. Photo #: JiveXML_141994_566308-RZ-LegoPlot-YX-2009-12-09-15-00-30-web |
DownloadLo resolution |
First 900 GeV Collision Events in Stable-Beam Conditions with Inner Detector Fully Powered, December 6, 2009
On Sunday morning, Dec 6, 2009, the LHC achieved for the first time 900 GeV collisions under stable-beam conditions. This allowed ATLAS to fully ramp the high voltage of the inner most pixel and silicon-strip tracking detectors. The following displays show events from run 141749 taken during this period. A display of a 2 jet event take a few days later with uncalibrated transverse energies of 54 GeV and 55 GeV, and pseudo-rapidities of -0.2 and -0.2, respectively. Photo #: atlas2009-collision-vp1-141994-566308-2jet-web |
DownloadLo resolution |
First 900 GeV Collision Events in Stable-Beam Conditions with Inner Detector Fully Powered, December 6, 2009
On Sunday morning, Dec 6, 2009, the LHC achieved for the first time 900 GeV collisions under stable-beam conditions. This allowed ATLAS to fully ramp the high voltage of the inner most pixel and silicon-strip tracking detectors. The following displays show events from run 141749 taken during this period. A display of an event with 2 reconstructed muons in the forward region. Photo #: atlas2009-collision-vp1-141749-133538-2muons-web |
DownloadLo resolution |
First 900 GeV Collision Events in Stable-Beam Conditions with Inner Detector Fully Powered, December 6, 2009
On Sunday morning, Dec 6, 2009, the LHC achieved for the first time 900 GeV collisions under stable-beam conditions. This allowed ATLAS to fully ramp the high voltage of the inner most pixel and silicon-strip tracking detectors. The following displays show events from run 141749 taken during this period. A display of a reconstructed secondary vertex from a Ks candidate decaying into 2 pions. Photo #: atlas2009-collision-atlantis-141749-460665-kshort-cand-web |
DownloadLo resolution |
First 2.36 TeV Collision Events recorded, December 14th, 2009
On Tuesday evening, December 8th, 2009, the LHC achieved for the first time 2.36 TeV collisions and ATLAS recorded their first events at this record energy. More events at this energy were taken on December 14th in the early morning. Display of an event with jets, taken on December 14th at 2.36 TeV. Photo #: atlas2009-collision-atlantis-142308-482137-web |
DownloadLo resolution |
First 2.36 TeV Collision Events recorded, December 8th, 2009
On Tuesday evening, December 8th, 2009, the LHC achieved for the first time 2.36 TeV collisions and ATLAS recorded their first events at this record energy. More events at this energy were taken on December 14th in the early morning. A view of an event taken on December 14th. Photo #: atlas2009-collision-vp1-142308-482137-web |
DownloadLo resolution |
On March 30, 2010, the LHC achieved 7 TeV collisions. Display of a jet event at 7 TeV recorded by ATLAS.
Photo #: JiveXML_152166_347262 |
DownloadLo resolution |
On March 30, 2010, the LHC achieved 7 TeV collisions. Display of a 7 TeV event... with to two inelastic proton-proton collisions (pile up).
Photo #: JiveXML_152166_467774-Pileup-improved |
DownloadLo resolution |
On March 30, 2010, the LHC achieved 7 TeV collisions. Event display of a 7 TeV proton collision recorded by ATLAS.
Photo #: JiveXML_152166_316199-link |
DownloadLo resolution |
On March 30, 2010, the LHC achieved 7 TeV collisions. Display of a 2 jet event at 7 TeV.
Photo #: atlas2010-vp1-152166-399473 |
DownloadLo resolution |
On March 30, 2010, the LHC achieved 7 TeV collisions. Another display of an event at 7 TeV with a muon candidate.
Photo #: atlas2010-vp1-152166-639756 |
DownloadLo resolution |
On March 30, 2010, the LHC achieved 7 TeV collisions. Display of an event at 7 TeV with Pixel detector fully on.
Photo #: JiveXML_152166_451982 |
DownloadLo resolution |
On March 30, 2010, the LHC achieved 7 TeV collisions. Display of an event at 7 TeV with a muon candidate.
Photo #: atlas2010-vp1-152166-322215 |
DownloadLo resolution |
On March 30, 2010, the LHC achieved 7 TeV collisions. Display of a 7 TeV proton collision event.
Photo #: atlas2010-vp1-152166-316199 |
DownloadLo resolution |
First candidate event for W boson to electron + neutrino seen in 7 TeV collision data.
Photo #: Atlantis-Wenu-lego-rz |
DownloadLo resolution |
First W boson candidate event recorded by ATLAS in 2010.
Photo #: VP1-W-mune |
DownloadLo resolution |
W boson candidate event recorded by ATLAS in 2010.
Photo #: VP1-W-munu-2 |
DownloadLo resolution |
W boson candidate event recorded by ATLAS in 2010.
Photo #: Atlantis-Wenu-lego-rz-2 |
DownloadLo resolution |
First candidate for an event with a Z boson decaying to two muons seen in 7 TeV collision data. 2010.
Photo #: atlas2010_vp1_run154822_evt14321500 |
DownloadLo resolution |
First candidate for an event with a Z boson decaying to two electrons seen in 7 TeV collision data. 2010.
Photo #: Atlantis_154817_968871-3d |
DownloadLo resolution |
A Multi-Jet Event from a 7 TeV Collision
Photo #: JiveXML_158548_2486978 |
DownloadLo resolutionHi resolution |
Early heavy ion events in first heavy-ion fill with stable beam collisions seen in the ATLAS Experiment, 8 November 2010.
Photo #: 1011255_01 |
DownloadLo resolutionHi resolution |
Early heavy ion events in first heavy-ion fill with stable beam collisions seen in the ATLAS Experiment, 8 November 2010.
Photo #: 1011255_02 |
DownloadHi resolution |
Candidate event with a Z decay to muon pairs, recoiling against missing-ET. The muon candidates have transverse momenta of 50 and 126 GeV and a dimuon invariant mass of 94 GeV; the missing ET is measured to be 161 GeV.
Photo #: atlas2010_ZmumuMet-candidate_run167776_evt129360643 |
DownloadHi resolution |
An event with asymmetric jets.
Photo #: run169136_evt1395684_v5 |
DownloadHi resolution |
An event with asymmetric jets.
Photo #: run169045_evt1914004_v5 |
DownloadHi resolution |
An event with asymmetric jets.
Photo #: run169045_evt1914004_v5 |
DownloadHi resolution |
A highly asymmetric dijet event, with one jet with ET > 100 GeV and no evident recoiling jet, and with high energy calorimeter cell deposits distributed over a wide azimuthal region.
Only tracks with pT > 2.6 GeV are shown, and only calorimeter energy deposits with cell energy ET > 700 MeV in the electromagnetic calorimeter, and E > 1 GeV in the
hadronic calorimeter.
Photo #: HI-asyjet-paper |
DownloadHi resolution |
Candidate W+Z double leptonic decay event. Candidate for a WZ ->eνμμ decay, collected on 7 October 2010.
The invariant mass of the two muons is 96 GeV. The transverse mass of the potential W boson is 57 GeV. Further event properties: PT(μ+) = 65 GeV PT(μ-) = 40 GeV PT(e) = 64 GeV ETmiss = 21 GeV Photo #: WenuZmumu-candidate-VP1-r166466-e26227945 |
DownloadHi resolution |
Candidate for a W->μν decay, with the W boson produced in association with a photon, collected on 28 October 2010.
The transverse mass of the W boson is 65 GeV. The muon and the photon are well isolated. Further event properties: PT(mu) = 38 GeV PT(gamma) = 39 GeV ETmiss = 30 GeV Photo #: Zeegamma-candidate-Atlantis-r167607-e28797604 |
DownloadHi resolution |
Candidate Z decays to leptons, produced in association with jets. Candidate for Z→μμ decay, with the Z produced in association with three jets, collected on 10 May 2010. In the xy projection, the 144 GeV transverse momentum of the Z boson is especially apparent. The muon transverse momenta are 96 GeV and 68 GeV, and their invariant mass is 79 GeV. The harder muon has left a significant energy deposit (see lego-plot projection), presumably through bremsstrahlung; this is not included in the standard Z mass calculation. The jet transverse energies are 168, 105, and 45 GeV. Photo #: Atlantis_158466_4174272_Zmumu3jets |
DownloadHi resolution |
A high mass dijet event: two high-pT jets with invariant mass 2.8 TeV. A track pT cut of 2.5 GeV has been applied for the display.
Photo #: JiveXML_160958_23181152-YX-RZ-LegoPlot-2010-08-18-09-42-44 |
DownloadHi resolution |
Event with a high mass dijet system: the invariant mass of the two highest-pT
jets is 2.55 TeV.
The highest pT jet has a pT of 420 GeV, and an
eta of -1.51, the second leading jet has pT of 320 GeV and an
eta of 2.32.
Jet momenta are calibrated according to the "EM+JES" scheme.
No other jets are found with pT above 20 GeV.
Event collected on 4 July 2010.
Photo #: Atlantis-dijet-highpt-159224_3533152 |
DownloadLo resolutionHi resolution |
Di-photon event display with mγγ = 143.1 GeV, and an additional jet in the ECAL endcap (shown on the right).
Photo #: figaux_16 |
DownloadLo resolutionHi resolution |
ATLAS event containing four muons. This event is consistent with coming from two Z particles decaying: both Z particles decay to two muons each. Such events are produced by Standard Model processes without Higgs particles. They are also a possible signature for Higgs particle production, but many events must be analysed together in order to tell if there is a Higgs signal. This view is a zoom into the central part of the detector. The four muons are picked out as red tracks. Other tracks and deposits of energy in the calorimeters are shown in yellow.
Photo #: 1112301_01 |
DownloadLo resolutionHi resolution |
ATLAS event containing two electrons and two muons. This event is consistent with coming from two Z particles decaying: one Z decays to two muons, the other to two electrons. Such events are produced by Standard Model processes without Higgs particles. They are also a possible signature for Higgs particle production, but many events must be analysed together in order to tell if there is a Higgs signal. The two muons are picked out as red tracks penetrating right through the detector. The two electrons are picked out as green tracks in the central, inner detector, matching narrow green clusters of energy in the barrel part of the calorimeters. The inset at the bottom right shows a map of the energy seen in the detector: the two big yellow spikes correspond to the two electrons.
Photo #: 1112300_01 |
DownloadLo resolutionHi resolution |
An event where two energetic photons ("gammas") are produced in a proton-proton collision in ATLAS. Many events of this type are produced by well-understood Standard Model processes ("backgrounds") which do not involve Higgs particles. A small excess of events of this type with similar masses could indicate evidence for Higgs particle production, but any specific event is most likely to be from the background. The photons are indicated, in the different projections and views, by the clusters of energy shown in yellow.
Photo #: 1112299_01 |
DownloadLo resolutionHi resolution |
An ATLAS event with 4 muons. The four muons are picked out as long blue tracks.
Photo #: FourMuon |
DownloadLo resolutionHi resolution |
An ATLAS event with 2 muons and 2 electrons. The two muons are picked out as long blue tracks, the two electrons as short blue tracks matching green clusters of energy in the calorimeters which lie outside the inner tracking detector.
Photo #: TwoElectronTwoMuon |
DownloadLo resolutionHi resolution |
An ATLAS event with 2 photons. The photons are indicated by the clusters of energy shown in green.
Photo #: TwoPhoton |
