Associated production of prompt J/ψ and Υ mesons in pp collisions at s = 13 TeV

R. Aaij*, A. S. W. Abdelmotteleb, C. Abellan Beteta, F. Abudinen, T. Ackernley, B. Adeva, M. Adinolfi, P. Adlarson, H. Afsharnia, C. Agapopoulou, C. A. Aidala, Z. Ajaltouni, S. Akar, K. Akiba, P. Albicocco, J. Albrecht, F. Alessio, M. Alexander, A. Alfonso Albero, Z. AlioucheP. Alvarez Cartelle, R. Amalric, S. Amato, J. L. Amey, Y. Amhis, L. An, L. Anderlini, M. Andersson, A. Andreianov, M. Andreotti, D. Andreou, D. Ao, F. Archilli, A. Artamonov, M. Artuso, E. Aslanides, M. Atzeni, B. Audurier, I. B. Bachiller Perea, S. Bachmann, M. Bachmayer, J. J. Back, A. Bailly-Reyre, P. Baladron Rodriguez, V. Balagura, W. Baldini, J. Baptista de Souza Leite, M. Barbetti, R. J. Barlow, S. Barsuk, LHCb collaboration, Carolina da silva Bolognani, Daniel Hugo Cámpora Pérez, Jacco de Vries, Miriam Lucio Martinez, Marcel Merk, Davide Nicotra, Chris Pawley, Keri Vos

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

The associated production of prompt J/ψ and Υ mesons in pp collisions at a centre-of-mass energy of s = 13 TeV is studied using LHCb data, corresponding to an integrated luminosity of 4 fb −1. The measurement is performed for J/ψ (Υ) mesons with a transverse momentum p T< 10 (30) GeV/c in the rapidity range 2.0 < y < 4.5. In this kinematic range, the cross-section of the associated production of prompt J/ψ and Υ(1S) mesons is measured to be 133 ± 22 ± 7 ± 3 pb, with a significance of 7.9 σ, and that of prompt J/ψ and Υ(2S) mesons to be 76 ± 21 ± 4 ± 7 pb, with a significance of 4.9 σ. The first uncertainty is statistical, the second systematic, and the third due to uncertainties on the used branching fractions. This is the first observation of the associated production of J/ψ and Υ(1S) in proton-proton collisions. Differential cross-sections are measured as functions of variables that are sensitive to kinematic correlations between the J/ψ and Υ(1S) mesons. The effective cross-sections of the associated production of prompt J/ψ and Υ mesons are obtained and found to be compatible with measurements using other particle productions.

Original languageEnglish
Article number93
Number of pages24
JournalJournal of High Energy Physics
Volume2023
Issue number8
DOIs
Publication statusPublished - 17 Aug 2023

Keywords

  • Flavour Physics
  • Hadron-Hadron Scattering
  • Hard Scattering
  • Heavy Quark Production
  • DOUBLE PARTON SCATTERINGS
  • J-PSI
  • HADRONIC PRODUCTION
  • UPSILON
  • DECAY
  • TOOL

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