ATLAS measurements of isolated photon cross-sections | Zendy

M. Fanti | Zendy; ATLAS Collaboration | Zendy

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ATLAS measurements of isolated photon cross-sections

Author(s) -

M. Fanti,

ATLAS Collaboration

Publication year - 2012

Publication title -

aip conference proceedings

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.177

H-Index - 75

eISSN - 1551-7616

pISSN - 0094-243X

DOI - 10.1063/1.3700631

Subject(s) - atlas (anatomy) , physics , large hadron collider , photon , particle physics , nuclear physics , atlas experiment , transverse plane , proton , perturbative qcd , quantum chromodynamics , optics , paleontology , structural engineering , biology , engineering

This document presents measurements of the cross-sections for the inclusive production of isolated prompt photons and di-photon events in proton-proton collisions at a centre-of-mass energy √s = 7 TeV, performed by the ATLAS experiment at the LHC. 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. The results are compared to predictions from next-to-leading order perturbative QCD calculations.

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