Measurement of the production cross section of pairs of isolated photons in pp collisions at 13 TeV with the ATLAS detector

被引:0
作者
G. Aad
B. Abbott
D. C. Abbott
A. Abed Abud
K. Abeling
D. K. Abhayasinghe
S. H. Abidi
H. Abramowicz
H. Abreu
Y. Abulaiti
A. C. Abusleme Hoffman
B. S. Acharya
B. Achkar
L. Adam
C. Adam Bourdarios
L. Adamczyk
L. Adamek
S. V. Addepalli
J. Adelman
A. Adiguzel
S. Adorni
T. Adye
A. A. Affolder
Y. Afik
C. Agapopoulou
M. N. Agaras
J. Agarwala
A. Aggarwal
C. Agheorghiesei
J. A. Aguilar-Saavedra
A. Ahmad
F. Ahmadov
W. S. Ahmed
X. Ai
G. Aielli
I. Aizenberg
S. Akatsuka
M. Akbiyik
T. P. A. Åkesson
A. V. Akimov
K. Al Khoury
G. L. Alberghi
J. Albert
M. J. Alconada Verzini
S. Alderweireldt
M. Aleksa
I. N. Aleksandrov
C. Alexa
T. Alexopoulos
A. Alfonsi
机构
[1] University of Adelaide,Department of Physics
[2] University of Alberta,Department of Physics
[3] Ankara University,Department of Physics
[4] Istanbul Aydin University,Division of Physics
[5] Application and Research Center for Advanced Studies,High Energy Physics Division
[6] TOBB University of Economics and Technology,Department of Physics
[7] LAPP,Department of Physics
[8] Univ. Savoie Mont Blanc,Physics Department
[9] CNRS/IN2P3,Physics Department
[10] Argonne National Laboratory,Department of Physics
[11] University of Arizona,Department of Physics
[12] University of Texas at Arlington,Department of Physics Engineering
[13] National and Kapodistrian University of Athens,Institut de Física d’Altes Energies (IFAE)
[14] National Technical University of Athens,Institute of High Energy Physics
[15] University of Texas at Austin,Physics Department
[16] Bahcesehir University,Department of Physics
[17] Faculty of Engineering and Natural Sciences,Institute of Physics
[18] Istanbul Bilgi University,Department for Physics and Technology
[19] Faculty of Engineering and Natural Sciences,Institut für Physik
[20] Bogazici University,Albert Einstein Center for Fundamental Physics and Laboratory for High Energy Physics
[21] Gaziantep University,School of Physics and Astronomy
[22] Barcelona Institute of Science and Technology,Facultad de Ciencias y Centro de Investigaciónes
[23] Chinese Academy of Sciences,Departamento de Física
[24] Tsinghua University,Dipartimento di Fisica e Astronomia A. Righi
[25] Nanjing University,Physikalisches Institut
[26] University of Chinese Academy of Science (UCAS),Department of Physics
[27] University of Belgrade,Department of Physics
[28] University of Bergen,Department of Physics
[29] Physics Division,Faculty of Mathematics, Physics and Informatics
[30] Lawrence Berkeley National Laboratory and University of California,Department of Subnuclear Physics
[31] Humboldt Universität zu Berlin,Physics Department
[32] University of Bern,Cavendish Laboratory
[33] University of Birmingham,Department of Physics
[34] Universidad Antonio Nariño,Department of Mechanical Engineering Science
[35] Universidad Nacional de Colombia,National Institute of Physics
[36] Università di Bologna,School of Physics
[37] INFN Sezione di Bologna,Department of Physics
[38] Universität Bonn,Faculté des Sciences
[39] Boston University,LPMR, Faculté des Sciences
[40] Brandeis University,Enrico Fermi Institute
[41] Transilvania University of Brasov,Nevis Laboratory
[42] Horia Hulubei National Institute of Physics and Nuclear Engineering,Niels Bohr Institute
[43] Alexandru Ioan Cuza University of Iasi,Dipartimento di Fisica
[44] National Institute for Research and Development of Isotopic and Molecular Technologies,Physics Department
[45] Physics Department,Physics Department
[46] University Politehnica Bucharest,Department of Physics
[47] West University in Timisoara,Lehrstuhl für Experimentelle Physik IV
[48] Comenius University,Institut für Kern
[49] Institute of Experimental Physics of the Slovak Academy of Sciences, und Teilchenphysik
[50] Brookhaven National Laboratory,Department of Physics
来源
Journal of High Energy Physics | / 2021卷
关键词
Hadron-Hadron scattering (experiments); photon production; proton-proton scattering; QCD;
D O I
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学科分类号
摘要
A measurement of prompt photon-pair production in proton-proton collisions at s\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ \sqrt{s} $$\end{document} = 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,γ12\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ {p}_{\mathrm{T}{,}_{\gamma 1(2)}} $$\end{document}> 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.
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