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Measurement of the cross section for isolated-photon plus jet production in ppcollisions at √s=13TeV using the ATLAS detector

  • The ATLAS collaboration
  • Mohamed I University
  • Aix-Marseille Université
  • University of Oklahoma
  • Azerbaijan National Academy of Sciences
  • IN2P3/CNRS
  • University of Toronto
  • University of California at Santa Cruz
  • University of Sussex
  • Tel Aviv University
  • Technion-Israel Institute of Technology
  • University of Oregon
  • Stockholm University
  • Oskar Klein Centre
  • National Institute for Nuclear Physics
  • Abdus Salam International Centre for Theoretical Physics
  • King's College London
  • The University of Tokyo
  • AGH University of Krakow
  • Northern Illinois University
  • Ludwig Maximilian University of Munich
  • Rutherford Appleton Laboratory
  • University of Belgrade
  • Alexandru Ioan Cuza University of Iaşi
  • Laboratório de Instrumentação e Física Experimental de Partículas
  • University of Granada
  • NOVA University Lisbon
  • Boston University
  • Joint Institute for Nuclear Research
  • University of Rome Tor Vergata
  • Kyoto University
  • Lund University
  • University of Geneva
  • P.N. Lebedev Physical Institute of the Russian Academy of Sciences
  • University of Bologna
  • University of Victoria BC
  • Universidad Nacional de La Plata
  • Radboud University Nijmegen
  • CERN
  • Horia Hulubei National Institute of Physics and Nuclear Engineering
  • National Technical University of Athens
  • Czech Technical University in Prague

Research output: Contribution to journalArticlepeer-review

47 Scopus citations

Abstract

The dynamics of isolated-photon production in association with a jet in proton–proton collisions at a centre-of-mass energy of 13 TeV are studied with the ATLAS detector at the LHC using a dataset with an integrated luminosity of 3.2 fb−1. Photons are required to have transverse energies above 125 GeV. Jets are identified using the anti-kt algorithm with radius parameter R=0.4 and required to have transverse momenta above 100 GeV. Measurements of isolated-photon plus jet cross sections are presented as functions of the leading-photon transverse energy, the leading-jet transverse momentum, the azimuthal angular separation between the photon and the jet, the photon–jet invariant mass and the scattering angle in the photon–jet centre-of-mass system. Tree-level plus parton-shower predictions from SHERPA and PYTHIA as well as next-to-leading-order QCD predictions from JETPHOX and SHERPA are compared to the measurements.

Original languageEnglish
Pages (from-to)578-602
Number of pages25
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume780
DOIs
StatePublished - May 10 2018

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