Measurement of differential cross sections for inclusive isolated-photon and photon+jet production in proton-proton collisions at $\sqrt{s} =$ 13 TeV

TL;DR

This paper reports measurements of inclusive isolated-photon and photon+jet production cross sections in proton-proton collisions at 13 TeV, using CMS data, and compares results with NLO QCD predictions, confirming theoretical models.

Contribution

First measurement of photon and photon+jet production cross sections at 13 TeV in the specified fiducial region with CMS data.

Findings

Measurements agree with NLO QCD predictions

Photon transverse energy distributions are provided

Results validate perturbative QCD at high energies

Abstract

Measurements of inclusive isolated-photon and photon+jet production in proton-proton collisions at $\sqrt{s} =$ 13 TeV are presented. The analysis uses data collected by the CMS experiment in 2015, corresponding to an integrated luminosity of 2.26 fb$^{-1}$. The cross section for inclusive isolated photon production is measured as a function of the photon transverse energy in a fiducial region. The cross section for photon+jet production is measured as a function of the photon transverse energy in the same fiducial region with identical photon requirements and with the highest transverse momentum jet. All measurements are in agreement with predictions from next-to-leading-order perturbative QCD.