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Scientific article
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English

Measurement of the inclusive isolated prompt photon cross-section in pp collisions at √s=7 TeV using 35 pb−1 of ATLAS data

ContributorsATLAS Collaboration
Published inPhysics letters. B, vol. 706, no. 2-3, p. 150-167
Publication date2011
Abstract

A measurement of the differential cross-section for the inclusive production of isolated prompt photons in pp collisions at a center-of-mass energy √s=7 TeV is presented. The measurement covers the pseudorapidity ranges |η|<1.37 and 1.52⩽|η|<2.37 in the transverse energy range 45⩽ET<400 GeV. The results are based on an integrated luminosity of 35 pb−1, collected with the ATLAS detector at the LHC. The yields of the signal photons are measured using a data-driven technique, based on the observed distribution of the hadronic energy in a narrow cone around the photon candidate and the photon selection criteria. The results are compared with next-to-leading order perturbative QCD calculations and found to be in good agreement over four orders of magnitude in cross-section.

Keywords
  • Photon
  • ATLAS
  • LHC
  • Standard Model
Citation (ISO format)
ATLAS Collaboration. Measurement of the inclusive isolated prompt photon cross-section in <em>pp</em> collisions at √s=7 TeV using 35 pb<sup>−1</sup> of ATLAS data. In: Physics letters. B, 2011, vol. 706, n° 2-3, p. 150–167. doi: 10.1016/j.physletb.2011.11.010
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ISSN of the journal0370-2693
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