Measurement of the inclusive isolated prompt photon cross section in pp collisions at s=8TeV with the ATLAS detector

The ATLAS Collaboration

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    Abstract

    Abstract: A measurement of the cross section for the inclusive production of isolated prompt photons in proton-proton collisions at a centre-of-mass energy of s=8 TeV is presented. The measurement covers the pseudorapidity ranges |ηγ | < 1.37 and 1.56 ≤ |ηγ | < 2.37 in the transverse energy range 25 < ET γ < 1500 GeV. The results are based on an integrated luminosity of 20.2 fb−1, recorded by the ATLAS detector at the LHC. Photon candidates are identified by combining information from the calorimeters and the inner tracker. The background is subtracted using a data-driven technique, based on the observed calorimeter shower-shape variables and the deposition of hadronic energy in a narrow cone around the photon candidate. The measured cross sections are compared with leading-order and next-to-leading order perturbative QCD calculations and are found to be in a good agreement over ten orders of magnitude.[Figure not available: see fulltext.]

    Original languageEnglish
    Article number5
    JournalJournal of High Energy Physics
    Volume2016
    Issue number8
    DOIs
    Publication statusPublished - 2016 Aug 1

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    Keywords

    • Hadron-Hadron scattering (experiments)
    • Photon production
    • proton-proton scattering

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

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