Measurement of J/ψ-pair production in pp collisions at √s=13 TeV and study of gluon transverse-momentum dependent PDFs

被引：0

作者：

Aaij, R.

Abdelmotteleb, A. S. W. ^{[56
]}

Beteta, C. Abellan ^{[50
]}

Abudinen, F. ^{[56
]}

Ackernley, T. ^{[60
]}

Adeva, B. ^{[46
]}

Adinolfi, M. ^{[54
]}

Adlarson, P. ^{[80
]}

Afsharnia, H. ^{[11
]}

Agapopoulou, C. ^{[48
]}

Aidala, C. A. ^{[81
]}

Ajaltouni, Z. ^{[11
]}

Akar, S. ^{[65
]}

Akiba, K. ^{[36
]}

Albicocco, P. ^{[25
]}

Albrecht, J. ^{[17
]}

Alessio, F. ^{[48
]}

Alexander, M. ^{[59
]}

Alfonso Albero, A. ^{[45
]}

Aliouche, Z. ^{[62
]}

Cartelle, P. Alvarez ^{[55
]}

Amalric, R. ^{[15
]}

Amato, S. ^{[3
]}

Amey, J. L. ^{[54
]}

Amhis, Y. ^{[13
,48
]}

An, L. ^{[6
]}

Anderlini, L. ^{[24
]}

Andersson, M. ^{[50
]}

Andreianov, A. ^{[43
]}

Andreola, P. ^{[50
]}

Andreotti, M. ^{[23
]}

Andreou, D. ^{[68
]}

Anelli, A. ^{[28
,96
]}

Ao, D. ^{[7
]}

Archilli, F. ^{[35
,102
]}

Cuendis, S. Arguedas ^{[9
]}

Artamonov, A. ^{[43
]}

Artuso, M. ^{[68
]}

Aslanides, E. ^{[12
]}

Atzeni, M. ^{[64
]}

Audurier, B. ^{[14
]}

Bacher, D. ^{[63
]}

Perea, I. Bachiller ^{[10
]}

Bachmann, S. ^{[19
]}

Bachmayer, M. ^{[49
]}

Back, J. J. ^{[56
]}

Bailly-reyre, A. ^{[15
]}

Baladron Rodriguez, P. ^{[46
]}

Balagura, V. ^{[14
]}

Baldini, W. ^{[23
]}

机构：

[1] Monash Univ, Sch Phys & Astron, Melbourne, Australia

[2] Monash Univ, Sch Phys & Astron, Melbourne, Australia

[3] Ctr Brasileiro Pesquisas Fis CBPF, Rio De Janeiro, Brazil

[4] Tsinghua Univ, Ctr High Energy Phys, Beijing, Peoples R China

[5] Inst High Energy Phys IHEP, Beijing, Peoples R China

[6] Peking Univ, Sch Phys, State Key Lab Nucl Phys & Technol, Beijing, Peoples R China

[7] Univ Chinese Acad Sci, Beijing, Peoples R China

[8] Cent China Normal Univ, Inst Particle Phys, Wuhan, Hubei, Peoples R China

[9] Consejo Nacl Rectores CONARE, San Jose, Costa Rica

[10] Univ Savoie Mt Blanc, CNRS, IN2P3 LAPP, Annecy, France

[11] Univ Clermont Auvergne, LPC, Clermont Ferrand, France

[12] Aix Marseille Univ, CPPM, CNRS, IN2P3, Marseille, France

[13] Univ Paris Saclay, IJCLab, CNRS, IN2P3, Orsay, France

[14] Inst Polytech Paris, Lab Leprince Ringuet, Ecole Polytech, CNRS,IN2P3, Palaiseau, France

[15] Sorbonne Univ, LPNHE, CNRS, IN2P3,Paris Diderot Sorbonne Paris Cite, Paris, France

[16] Rhein Westfal TH Aachen, Phys Inst 1, Aachen, Germany

[17] Tech Univ Dortmund, Fak Phys, Dortmund, Germany

[18] Max Planck Inst Kernphys MPIK, Heidelberg, Germany

[19] Heidelberg Univ, Phys Inst, Heidelberg, Germany

[20] Univ Coll Dublin, Sch Phys, Dublin, Ireland

[21] INFN, Sez Bari, Bari, Italy

[22] INFN, Sez Bologna, Bologna, Italy

[23] INFN, Sez Ferrara, Ferrara, Italy

[24] INFN, Sez Firenze, Florence, Italy

[25] INFN, Lab Nazl Frascati, Frascati, Italy

[26] INFN, Sez Genova, Genoa, Italy

[27] INFN, Sez Milano, Milan, Italy

[28] INFN, Sez Milano Bicocca, Milan, Italy

[29] INFN, Sez Cagliari, Monserrato, Italy

[30] Univ Padua, Padua, Italy

[31] INFN, Padua, Italy

[32] INFN, Sez Perugia, Perugia, Italy

[33] INFN, Sez Pisa, Pisa, Italy

[34] INFN, Sez Roma La Sapienza, Rome, Italy

[35] INFN, Sez Roma Tor Vergata, Rome, Italy

[36] Nikhef Natl Inst Subat Phys, Amsterdam, Netherlands

[37] Nikhef Natl Inst Subat Phys, Amsterdam, Netherlands

[38] Vrije Univ Amsterdam, Amsterdam, Netherlands

[39] Univ Sci & Technol, AGH, Fac Phys & Appl Comp Sci, Krakow, Poland

[40] Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Krakow, Poland

[41] Natl Ctr Nucl Res NCBJ, Warsaw, Poland

[42] Horia Hulubei Natl Inst Phys & Nucl Engn, Bucharest, Romania

[43] CERN, Inst Covered Cooperat Agreement, Geneva, Switzerland

[44] Univ Ramon Llull, DS4DS, Barcelona, Spain

[45] Univ Barcelona, ICCUB, Barcelona, Spain

[46] Univ Santiago de Compostela, Inst Galego Fis Altas Enerxias IGFAE, Santiago De Compostela, Spain

[47] Ctr Mixto Univ Valencia CSIC, Inst Fis Corpuscular, Valencia, Spain

[48] European Org Nucl Res CERN, Geneva, Switzerland

[49] Ecole Polytech Fed Lausanne EPFL, Inst Phys, Lausanne, Switzerland

[50] Univ Zurich, Phys Inst, Zurich, Switzerland

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2024年 / 03期

关键词：

Hadron-Hadron Scattering; Multi-Parton Interactions; QCD; Quarkonium; DOUBLE PARTON SCATTERINGS; MATRIX-ELEMENT; HELAC-ONIA; GENERATOR;

D O I：

10.1007/JHEP03(2024)088

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The production cross-section of J/psi pairs in proton-proton collisions at a centre-of-mass energy of root s = 13TeV 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/psi mesons in the transverse momentum range 0 < p(T) < 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 Delta y between the two J/psi mesons. The effective cross-section of double-parton scattering is measured to be sigma(eff) = 13.1 +/- 1.8 (stat) +/- 2.3 (syst) mb. The distribution of the azimuthal angle phi(CS) of one of the J/psi mesons in the Collins-Soper frame and the p(T)-spectrum of the J/psi pairs are also measured for the study of the gluon transverse-momentum dependent distributions inside protons. The extracted values of < cos4 phi(CS)> and < cos2 phi(CS)> are consistent with zero, but the presence of azimuthal asymmetry at a few percent level is allowed.

引用

页数：40

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Baesso, C.
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Barter, W.
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