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SUMMARY:Evidence of prompt isolated photons with the ATLAS detector
DTSTART;VALUE=DATE-TIME:20100724T081500Z
DTEND;VALUE=DATE-TIME:20100724T082800Z
DTSTAMP;VALUE=DATE-TIME:20130521T031323Z
UID:indico-contribution-503@cern.ch
DESCRIPTION:Speakers: TOJO\, Junji (KEK)\nPhoton identification is importa
 nt for many physics signatures at the LHC\, as well as for detector calibr
 ation purposes. Prompt photon identification in ATLAS relies on the fine g
 ranularity of the electromagnetic calorimeter\, which provides event by ev
 ent rejection of the dominant background from photons from pi^0 decays\, a
 nd on the inner detector\, which allows us to reconstruct photon conversio
 ns to electron-positron pairs. The cross-section of prompt photon producti
 on at LHC is large enough that only a small integrated luminosity is requi
 red to produce a significant number of signal events. This contribution de
 scribes the extraction of the prompt photon signal above the background in
  the early LHC data with the ATLAS detector collected at a center of mass 
 energy of 7 TeV.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId
 =503&sessionId=54&confId=73513
LOCATION: Salle 252B
URL:http://indico.cern.ch/contributionDisplay.py?contribId=503&sessionId=5
 4&confId=73513
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