Please use this identifier to cite or link to this item:
|Scopus||Web of Science®||Altmetric|
|Title:||Measurement of the production cross section of pairs of isolated photons in pp collisions at 13 TeV with the ATLAS detector|
Abed Abud, A.
Abusleme Hoffman, A.C.
Adam Bourdarios, C.
|Citation:||The Journal of High Energy Physics, 2021; 2021(11):169[i]-169-52|
|G. Aad … P. Jackson … A.X.Y. Kong … J.L. Oliver … H. Potti … T.A. Ruggeri … A.S. Sharma … M.J. White … et al. [The ATLAS Collaboration]|
|Abstract:||A measurement of prompt photon-pair production in proton-proton collisions at s√ = 13 TeV is presented. The data were recorded by the ATLAS detector at the LHC with an integrated luminosity of 139 fb⁻¹. Events with two photons in the well-instrumented region of the detector are selected. The photons are required to be isolated and have a transverse momentum of pT,(γ1(2)) > 40 (30) GeV for the leading (sub-leading) photon. The differential cross sections as functions of several observables for the diphoton system are measured and compared with theoretical predictions from state-of-the-art Monte Carlo and fixed-order calculations. The QCD predictions from next-to-next-to-leading-order calculations and multi-leg merged calculations are able to describe the measured integrated and differential cross sections within uncertainties, whereas lower-order calculations show significant deviations, demonstrating that higher-order perturbative QCD corrections are crucial for this process. The resummed predictions with parton showers additionally provide an excellent description of the low transverse-momentum regime of the diphoton system.|
|Keywords:||Hadron-Hadron scattering (experiments); photon production; proton-proton scattering; QCD|
|Rights:||Copyright CERN, for the benefit of the ATLAS Collaboration. Article funded by SCOAP³. Open Access. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.|
|Appears in Collections:||Physics publications|
Files in This Item:
|hdl_133999.pdf||Published Version||4.1 MB||Adobe PDF||View/Open|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.