Measurement of the production cross section of pairs of isolated photons in pp collisions at 13 TeV with the ATLAS detector
Authors
Alunno Camelia, E
Amelung, C
Amrouche, CS
Publication Date
2021Journal Title
Journal of High Energy Physics
ISSN
1029-8479
Publisher
Springer Science and Business Media LLC
Volume
2021
Issue
11
Language
en
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Aad, G., Abbott, B., Abbott, D., Abed Abud, A., Abeling, K., Abhayasinghe, D., Abidi, S., et al. (2021). Measurement of the production cross section of pairs of isolated photons in pp collisions at 13 TeV with the ATLAS detector. Journal of High Energy Physics, 2021 (11) https://doi.org/10.1007/JHEP11(2021)169
Abstract
A measurement of prompt photon-pair production in proton-proton collisions at
$\sqrt{s}=13$ 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
$p_\mathrm{T,\gamma_{1(2)}} > 40(30)$ 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
Regular Article - Experimental Physics, Hadron-Hadron scattering (experiments), photon production, proton-proton scattering, QCD
Identifiers
jhep11(2021)169, 17211
External DOI: https://doi.org/10.1007/JHEP11(2021)169
This record's URL: https://www.repository.cam.ac.uk/handle/1810/334431
Rights
Licence:
http://creativecommons.org/licenses/by/4.0/
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