PoS - Proceedings of Science
Volume 314 - The European Physical Society Conference on High Energy Physics (EPS-HEP2017) - QCD and Hadronic Physics (Parallel Session). Conveners: Ulla Blumenschein; Kostas Kousouris; Maria Ubiali. Scientific Secretary: Pierpaolo Mastrolia
Measurement of photon production cross sections with the ATLAS detector
R. Turra*  on behalf of the ATLAS Collaboration
Full text: pdf
Pre-published on: November 02, 2017
Published on: March 20, 2018
Abstract
The production of prompt isolated photons at hadron colliders provides a stringent test of perturbative QCD and can be used to probe the proton structure. The ATLAS Collaboration has performed precise measurements of the inclusive production of isolated prompt photons at a centre-of-mass energy of 13 TeV, differential in both rapidity and photon transverse momentum. In addition, the integrated and differential cross sections for isolated photon pairs at 8 TeV have been measured. The results are compared with state-of-the-art theory predictions at NLO in QCD and with predictions of several MC generators.

The production of prompt photons in association with jets provides an additional testing ground for perturbative QCD (pQCD) with a hard colourless probe less affected by hadronisation effects than jet production. The dynamics of isolated-photon plus jet production in pp collisions at a centre-of-mass energy of 8 and 13 TeV will be presented and discussed.
DOI: https://doi.org/10.22323/1.314.0414
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