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Title: Measurement of the inclusive isolated prompt photon cross section in pp collisions at √s = 7 TeV with the ATLAS detector

A measurement of the cross section for the inclusive production of isolated prompt photons in pp collisions at a centre-of-mass energy √s = 7TeV is presented. The measurement covers the pseudorapidity ranges |ηγ| < 1.37 and 1.52 < |ηγ| < 1.81 in the transverse energy range 15 ≤ ETγ < 100 GeV. The results are based on an integrated luminosity of 880 nb-1, collected with the ATLAS detector at the Large Hadron Collider. Photon candidates are identified by combining information from the calorimeters and from the inner tracker. Residual background in the selected sample is estimated from data based on the observed distribution of the transverse isolation energy in a narrow cone around the photon candidate. Results are compared to predictions from next-to-leading order perturbative QCD calculations.
Authors:
 [1]
  1. Albert-Ludwigs-Univ., Freiburg (Germany). et al.
Publication Date:
Grant/Contract Number:
FG02-95ER40893
Type:
Published Article
Journal Name:
Physical Review. D, Particles, Fields, Gravitation and Cosmology
Additional Journal Information:
Journal Volume: D83; Journal ID: ISSN 1550-7998
Publisher:
American Physical Society (APS)
Research Org:
Univ. of Pennsylvania, Philadelphia, PA (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Orgs:
ATLAS Collaboration
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; photon cross section in pp collisions
OSTI Identifier:
1100069
Alternate Identifier(s):
OSTI ID: 1196765