Measurement of the inclusive isolated prompt photon cross-section in $pp$ collisions at $\sqrt{s}=$ 7 TeV using 35 pb$^{-1}$ of ATLAS data - INSPIRE

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Measurement of the inclusive isolated prompt photon cross-section in $pp$ collisions at $\sqrt{s}=$ 7 TeV using 35 pb $^{-1}$ of ATLAS data

ATLAS

Collaboration

Aug, 2011

18 pages

Published in:

Phys.Lett.B 706 (2011) 150-167

Published: Jul 16, 2013

e-Print:

1108.0253 [hep-ex]

DOI:

10.1016/j.physletb.2011.11.010

Report number:

CERN-PH-EP-2011-115

Experiments:

CERN-LHC-ATLAS

View in:

reference search131 citations

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Abstract: (Elsevier)

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.

Note:

7 pages plus author list (18 pages total), 2 figures, 4 tables, final version published in Physics Letters B

Photon
ATLAS
LHC
Standard Model
photon: direct production
photon: isolated production
energy: hadronic
quantum chromodynamics: perturbation theory
ATLAS
differential cross section: transverse energy: measured

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