Measurement of the inclusive isolated-photon cross section in $pp$ collisions at $\sqrt{s}=13$ TeV using 36 fb${}^{-1}$ of ATLAS data

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.

49 pages in total, author list starting page 33, 12 figures, 2 tables, submitted to JHEP. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2017-29/

References in corpus (13)

• Parton distributions for the LHC
• New parton distributions for collider physics
• Event generation with SHERPA 1.1
• Parton distributions in the LHC era: MMHT 2014 PDFs
• A parton shower algorithm based on Catani-Seymour dipole factorisation
• The Catchment Area of Jets
• Electron and photon energy calibration with the ATLAS detector using LHC Run 1 data
• A new critical study of photon production in hadronic collisions
• Quantitative constraints on the gluon distribution function in the proton from collider isolated-photon data
• Photon - Jet Correlations and Constraints on Fragmentation Functions
• Photon-jet correlations in $pp$ and $p\bar{p}$ collisions
• Reconsideration of the inclusive prompt photon production at LHC with kt-factorization
• Isolated photon and photon+jet production at NNLO QCD accuracy and the ratio $R_{13/8}^{\gamma }$

Cited by in corpus (11)

• Measurement of $Z\gamma \gamma$ production in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Vector Bosons and Jets in Proton Collisions
• Measurement of isolated-photon plus two-jet production in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Electroweak, QCD and flavour physics studies with ATLAS data from Run 2 of the LHC
• Single Photon Production at Hadron Colliders at NNLO QCD with Realistic Photon Isolation
• Master Integrals for Electroweak corrections to $gg\to \gamma \gamma$ -- Light quark contributions
• Measurement of the inclusive isolated-photon production cross section in pp collisions at $\sqrt{s}$ = 13 TeV
• Single isolated photon production in the NLO${}^{\star }$ approximation of the Parton Reggeization Approach
• Measurement of the inclusive isolated-photon production cross section in pp and Pb$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Hard processes in multi-TeV ion collisions
• Experimental QCD summary (ICHEP 2020)