2011/08/31 by ATLAS Collaboration, G. Aad, B. Abbott +98 · 109 citations
Physics and Astronomy · #Astronomy #Astrophysics #Charged particle #Cross section (physics) #Hadron #High-Energy Particle Collisions Research #Large Hadron Collider #Luminosity #Nuclear physics #Optics #Particle physics #Particle physics theoretical and experimental studies #Perturbative QCD #Photon #Photon energy #Physics #Pseudorapidity #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #hep-ex
paper · pdf · open access · doi:10.1016/j.physletb.2011.11.010
published in Physics Letters B 706(2-3), 150-167 (Elsevier BV) · 7 pages plus author list (18 pages total), 2 figures, 4 tables, final version published in Physics Letters B
openalex publication_date 2011/11/08 · arxiv created 2011/12/07 · arxiv updated 2015/03/19 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
A measurement of the differential cross-section for the inclusive production of isolated prompt photons in pp collisions at a center-of-mass energy sqrt(s) = 7 TeV is presented. The measurement covers the pseudorapidity ranges |eta|<1.37 and 1.52<=|eta|<2.37 in the transverse energy range 45<=ET<400GeV. 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.