Measurement of J/ψ-pair 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 and study of gluon transverse-momentum dependent PDFs

被引：0

作者：

R. Aaij ^{[35
]}

A. S. W. Abdelmotteleb ^{[53
]}

C. Abellan Beteta ^{[47
]}

F. Abudinén ^{[53
]}

T. Ackernley ^{[57
]}

B. Adeva ^{[43
]}

M. Adinolfi ^{[51
]}

P. Adlarson ^{[77
]}

H. Afsharnia ^{[11
]}

C. Agapopoulou ^{[45
]}

C. A. Aidala ^{[78
]}

Z. Ajaltouni ^{[11
]}

S. Akar ^{[62
]}

K. Akiba ^{[35
]}

P. Albicocco ^{[25
]}

J. Albrecht ^{[17
]}

F. Alessio ^{[45
]}

M. Alexander ^{[56
]}

A. Alfonso Albero ^{[42
]}

Z. Aliouche ^{[59
]}

P. Alvarez Cartelle ^{[52
]}

R. Amalric ^{[15
]}

S. Amato ^{[3
]}

J. L. Amey ^{[51
]}

Y. Amhis ^{[13
]}

L. An ^{[45
]}

L. Anderlini ^{[6
]}

M. Andersson ^{[24
]}

A. Andreianov ^{[47
]}

P. Andreola ^{[47
]}

M. Andreotti ^{[23
]}

D. Andreou ^{[65
]}

A. Anelli ^{[28
]}

D. Ao ^{[93
]}

F. Archilli ^{[7
]}

S. Arguedas Cuendis ^{[34
]}

A. Artamonov ^{[99
]}

M. Artuso ^{[9
]}

E. Aslanides ^{[65
]}

M. Atzeni ^{[12
]}

B. Audurier ^{[61
]}

D. Bacher ^{[14
]}

I. Bachiller Perea ^{[60
]}

S. Bachmann ^{[10
]}

M. Bachmayer ^{[19
]}

J. J. Back ^{[46
]}

A. Bailly-reyre ^{[53
]}

P. Baladron Rodriguez ^{[15
]}

V. Balagura ^{[43
]}

W. Baldini ^{[14
]}

机构：

[1] Monash University,School of Physics and Astronomy

[2] Centro Brasileiro de Pesquisas Físicas (CBPF),Center for High Energy Physics

[3] Universidade Federal do Rio de Janeiro (UFRJ),School of Physics State Key Laboratory of Nuclear Physics and Technology

[4] Tsinghua University,Institute of Particle Physics

[5] Institute Of High Energy Physics (IHEP),I. Physikalisches Institut

[6] Peking University,Fakultät Physik

[7] University of Chinese Academy of Sciences,Physikalisches Institut

[8] Central China Normal University,School of Physics

[9] Consejo Nacional de Rectores (CONARE),Instituto Galego de Física de Altas Enerxías (IGFAE)

[10] Université Savoie Mont Blanc,Physik

[11] CNRS,Institut

[12] IN2P3-LAPP,H.H. Wills Physics Laboratory

[13] Université Clermont Auvergne,Cavendish Laboratory

[14] CNRS/IN2P3,Department of Physics

[15] LPC,School of Physics and Astronomy

[16] Aix Marseille Univ,School of Physics and Astronomy

[17] CNRS/IN2P3,Oliver Lodge Laboratory

[18] CPPM,Department of Physics and Astronomy

[19] Université Paris-Saclay,Department of Physics

[20] CNRS/IN2P3,School of Physics and Electronics

[21] IJCLab,Guangdong Provincial Key Laboratory of Nuclear Science, Guangdong

[22] Laboratoire Leprince-Ringuet,Hong Kong Joint Laboratory of Quantum Matter, Institute of Quantum Matter

[23] CNRS/IN2P3,School of Physics and Technology

[24] Ecole Polytechnique,Departamento de Fisica

[25] Institut Polytechnique de Paris,Van Swinderen Institute

[26] LPNHE,Department of Physics and Astronomy

[27] Sorbonne Université,undefined

[28] Paris Diderot Sorbonne Paris Cité,undefined

[29] CNRS/IN2P3,undefined

[30] RWTH Aachen University,undefined

[31] Technische Universität Dortmund,undefined

[32] Max-Planck-Institut für Kernphysik (MPIK),undefined

[33] Ruprecht-Karls-Universität Heidelberg,undefined

[34] University College Dublin,undefined

[35] INFN Sezione di Bari,undefined

[36] INFN Sezione di Bologna,undefined

[37] INFN Sezione di Ferrara,undefined

[38] INFN Sezione di Firenze,undefined

[39] INFN Laboratori Nazionali di Frascati,undefined

[40] INFN Sezione di Genova,undefined

[41] INFN Sezione di Milano,undefined

[42] INFN Sezione di Milano-Bicocca,undefined

[43] INFN Sezione di Cagliari,undefined

[44] Università degli Studi di Padova,undefined

[45] Università e INFN,undefined

[46] Padova,undefined

[47] INFN Sezione di Perugia,undefined

[48] INFN Sezione di Pisa,undefined

[49] INFN Sezione di Roma La Sapienza,undefined

[50] INFN Sezione di Roma Tor Vergata,undefined

来源：

Journal of High Energy Physics | / 2024卷 / 3期

关键词：

Hadron-Hadron Scattering; Multi-Parton Interactions; QCD; Quarkonium;

D O I：

10.1007/JHEP03(2024)088

中图分类号：

学科分类号：

摘要：

The production cross-section of J/ψ pairs in proton-proton collisions at a centre-of-mass energy of 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 measured using a data sample corresponding to an integrated luminosity of 4.2 fb−1 collected by the LHCb experiment. The measurement is performed with both J/ψ mesons in the transverse momentum range 0 < pT< 14 GeV/c and rapidity range 2.0 < y < 4.5. The cross-section of this process is measured to be 16.36 ± 0.28 (stat) ± 0.88 (syst) nb. The contributions from single-parton scattering and double-parton scattering are separated based on the dependence of the cross-section on the absolute rapidity difference ∆y between the two J/ψ mesons. The effective cross-section of double-parton scattering is measured to be σeff = 13.1 ± 1.8 (stat) ± 2.3 (syst) mb. The distribution of the azimuthal angle ϕCS of one of the J/ψ mesons in the Collins-Soper frame and the pT-spectrum of the J/ψ pairs are also measured for the study of the gluon transverse-momentum dependent distributions inside protons. The extracted values of ⟨cos 2ϕCS⟩ and ⟨cos 4ϕCS⟩ are consistent with zero, but the presence of azimuthal asymmetry at a few percent level is allowed.

引用

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