Measurement of the inclusive isolated-photon cross section in pp collisions at s√s = 13 TeV using 36 fb−1 of ATLAS data

Date

2019

Authors

Aad, G.
Abbott, B.
Abbott, D.C.
Abdinov, O.
Abed Abud, A.
Abeling, K.
Abhayasinghe, D.K.
Abidi, S.H.
AbouZeid, O.S.
Abraham, N.L.

Journal Title

Journal ISSN

Volume Title

Publisher

Journal of High Energy Physics

Abstract

The differential cross section for isolated-photon production in pp collisions is measured at a centre-of-mass energy of 13 TeV with the ATLAS detector at the LHC using an integrated luminosity of 36.1 fb−1. The differential cross section is presented as a function of the photon transverse energy in different regions of photon pseudorapidity. The differential cross section as a function of the absolute value of the photon pseudorapidity is also presented in different regions of photon transverse energy. Next-to-leading-order QCD calculations from Jetphox and Sherpa as well as next-to-next-to-leading-order QCD calculations from Nnlojet are compared with the measurement, using several parameterisations of the proton parton distribution functions. The predictions provide a good description of the data within the experimental and theoretical uncertainties.

Description

Keywords

Hadron-Hadron scattering (experiments), Photon production, QCD

Citation

Aad, G., Abbott, B., Abbott, D. C., Abdinov, O., Abed Abud, A., Abeling, K., … Zwalinksi, L. (2019). Measurement of the inclusive isolated-photon cross section in pp collisions at s√s = 13 TeV using 36 fb−1 of ATLAS data. Journal of High Energy Physics, 2019(10). https://doi.org/10.1007/JHEP10(2019)203