Measurements of inclusive and differential cross-sections of tt¯γ\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ t\overline{t}\gamma $$\end{document} production in pp 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 with the ATLAS detector

被引：0

作者：

G. Aad ^{[51
]}

E. Aakvaag ^{[54
]}

B. Abbott ^{[55
]}

K. Abeling ^{[60
]}

N. J. Abicht ^{[189
]}

S. H. Abidi ^{[270
]}

M. Aboelela ^{[155
]}

A. Aboulhorma ^{[21
]}

H. Abramowicz ^{[174
]}

H. Abreu ^{[83
]}

Y. Abulaiti ^{[77
]}

B. S. Acharya ^{[46
]}

A. Ackermann ^{[71
]}

C. Adam Bourdarios ^{[62
]}

L. Adamczyk ^{[218
]}

S. V. Addepalli ^{[217
]}

M. J. Addison ^{[171
]}

J. Adelman ^{[105
]}

A. Adiguzel ^{[106
]}

T. Adye ^{[249
]}

A. A. Affolder ^{[96
]}

Y. Afik ^{[5
]}

M. N. Agaras ^{[137
]}

J. Agarwala ^{[36
]}

A. Aggarwal ^{[154
]}

C. Agheorghiesei ^{[168
]}

A. Ahmad ^{[29
]}

F. Ahmadov ^{[194
]}

W. S. Ahmed ^{[196
]}

S. Ahuja ^{[65
]}

X. Ai ^{[14
]}

G. Aielli ^{[114
]}

A. Aikot ^{[115
]}

M. Ait Tamlihat ^{[153
]}

B. Aitbenchikh ^{[39
]}

I. Aizenberg ^{[64
]}

M. Akbiyik ^{[13
]}

T. P. A. Åkesson ^{[157
]}

A. V. Akimov ^{[148
]}

D. Akiyama ^{[95
]}

N. N. Akolkar ^{[120
]}

S. Aktas ^{[121
]}

K. Al Khoury ^{[231
]}

G. L. Alberghi ^{[62
]}

J. Albert ^{[58
]}

P. Albicocco ^{[237
]}

G. L. Albouy ^{[153
]}

S. Alderweireldt ^{[151
]}

Z. L. Alegria ^{[236
]}

M. Aleksa ^{[34
]}

机构：

[1] University of Adelaide,Department of Physics

[2] University of Alberta,Department of Physics

[3] Ankara University,Department of Physics

[4] TOBB University of Economics and Technology,Division of Physics

[5] LAPP,High Energy Physics Division

[6] Université Savoie Mont Blanc,Department of Physics

[7] CNRS/IN2P3,Department of Physics

[8] APC,Physics Department

[9] Université Paris Cité,Physics Department

[10] CNRS/IN2P3,Department of Physics

[11] Argonne National Laboratory,Institute of Physics

[12] University of Arizona,Institut de Física d’Altes Energies (IFAE)

[13] University of Texas at Arlington,Institute of High Energy Physics

[14] National and Kapodistrian University of Athens,Physics Department

[15] National Technical University of Athens,Department of Physics

[16] University of Texas at Austin,School of Science

[17] Azerbaijan Academy of Sciences,Institute of Physics

[18] Barcelona Institute of Science and Technology,Department for Physics and Technology

[19] Chinese Academy of Sciences,Physics Division

[20] Tsinghua University,Institut für Physik

[21] Nanjing University,Albert Einstein Center for Fundamental Physics and Laboratory for High Energy Physics

[22] Shenzhen Campus of Sun Yat-sen University,School of Physics and Astronomy

[23] University of Chinese Academy of Science (UCAS),Department of Physics

[24] University of Belgrade,Department of Physics Engineering

[25] University of Bergen,Department of Physics

[26] Lawrence Berkeley National Laboratory,Facultad de Ciencias y Centro de Investigaciónes

[27] University of California,Departamento de Física

[28] Humboldt Universität zu Berlin,Dipartimento di Fisica e Astronomia A. Righi

[29] University of Bern,Physikalisches Institut

[30] University of Birmingham,Department of Physics

[31] Bogazici University,Department of Physics

[32] Gaziantep University,Department of Physics

[33] Istanbul University,Faculty of Physics

[34] Universidad Antonio Nariño,Faculty of Mathematics, Physics and Informatics

[35] Universidad Nacional de Colombia,Physics Department

[36] Università di Bologna,Cavendish Laboratory

[37] INFN Sezione di Bologna,Department of Physics

[38] Universität Bonn,Department of Mechanical Engineering Science

[39] Boston University,National Institute of Physics

[40] Brandeis University,School of Physics

[41] Transilvania University of Brasov,Department of Physics

[42] Horia Hulubei National Institute of Physics and Nuclear Engineering,Faculté des Sciences Ain Chock

[43] Alexandru Ioan Cuza University of Iasi,Faculté des Sciences

[44] National Institute for Research and Development of Isotopic and Molecular Technologies,LPMR, Faculté des Sciences

[45] Physics Department,Faculté des sciences

[46] National University of Science and Technology Politechnica,Institute of Applied Physics

[47] West University in Timisoara,Enrico Fermi Institute

[48] University of Bucharest,Nevis Laboratory

[49] Comenius University,Niels Bohr Institute

[50] Department of Subnuclear Physics,Dipartimento di Fisica

来源：

Journal of High Energy Physics | / 2024卷 / 10期

关键词：

Hadron-Hadron Scattering;

D O I：

10.1007/JHEP10(2024)191

中图分类号：

学科分类号：

摘要：

Inclusive and differential cross-sections are measured at particle level for the associated production of a top quark pair and a photon (tt¯γ\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ t\overline{t}\gamma $$\end{document}). The analysis is performed using an integrated luminosity of 140 fb−1 of proton-proton collisions at a centre-of-mass energy of 13 TeV collected by the ATLAS detector. The measurements are performed in the single-lepton and dilepton top quark pair decay channels focusing on tt¯γ\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ t\overline{t}\gamma $$\end{document} topologies where the photon is radiated from an initial-state parton or one of the top quarks. The absolute and normalised differential cross-sections are measured for several variables characterising the photon, lepton and jet kinematics as well as the angular separation between those objects. The observables are found to be in good agreement with the Monte Carlo predictions. The photon transverse momentum differential distribution is used to set limits on effective field theory parameters related to the electroweak dipole moments of the top quark. The combined limits using the photon and the Z boson transverse momentum measured in tt¯\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ t\overline{t} $$\end{document} production in associations with a Z boson are also set.

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