Dynamics of isolated-photon plus jet production in pp collisions at root s=7 TeV with the ATLAS detector


Aad G., Abajyan T., Abbott B., Abdallah J., Khalek S. A. , Abdelalim A. A. , ...More

NUCLEAR PHYSICS B, vol.875, no.3, pp.483-535, 2013 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 875 Issue: 3
  • Publication Date: 2013
  • Doi Number: 10.1016/j.nuclphysb.2013.07.025
  • Journal Name: NUCLEAR PHYSICS B
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.483-535
  • Keywords: QCD, Photon, Jet, FRAGMENTATION

Abstract

The dynamics of isolated-photon plus jet production in pp collisions at a centre-of-mass energy of 7 TeV has been studied with the ATLAS detector at the LHC using an integrated luminosity of 37 pb(-1). Measurements of isolated-photon plus jet bin-averaged cross sections are presented as functions of photon transverse energy, jet transverse momentum and jet rapidity. In addition, the bin-averaged cross sections as functions of the difference between the azimuthal angles of the photon and the jet, the photon jet invariant mass and the scattering angle in the photon jet centre-of-mass frame have been measured. Next-to-leading-order QCD calculations are compared to the measurements and provide a good description of the data, except for the case of the azimuthal opening angle. (C) 2013 CERN. Published by Elsevier B.V. All rights reserved.