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

Research output: Contribution to journalArticle

  • Authors:
  • ATLAS Collaboration
  • Rafal Bielski
  • Ian Connelly
  • Brian Cox
  • Cinzia Da Via
  • Nicholas Dann
  • Alessandra Forti
  • James Howarth
  • David Lack
  • Frederick Loebinger
  • Stephen Marsden
  • Jiri Masik
  • Stephen Menary
  • Francisca Munoz Sanchez
  • Alexander Oh
  • Joleen Pater
  • Yvonne Peters
  • Andrew Pilkington
  • Darren Price
  • Yang Qin
  • John Raine
  • Jacob Rawling
  • Rhys Roberts
  • H. Schweiger
  • Savanna Shaw
  • Lee Tomlinson
  • Stephen Watts
  • Fabian Wilk
  • Terence Wyatt

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.

Bibliographical metadata

Original languageEnglish
JournalPhysics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics
Early online date15 Mar 2018
DOIs
Publication statusPublished - 2018