Associated production of prompt $J/ψ$ and Υ mesons in $pp$ collisions at $$\sqrt{s}$$ = 13 TeV
- Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands); The LHCb collaboration. et al.
The associated production of prompt J/ψ and Υ mesons in pp collisions at a centre-of-mass energy of $$\sqrt{s}$$ = 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 pT < 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 signifcance of 7.9 σ, and that of prompt J/ψ and Υ(2S) mesons to be 76 ± 21 ± 4 ± 7 pb, with a signifcance of 4.9 σ. The frst uncertainty is statistical, the second systematic, and the third due to uncertainties on the used branching fractions. This is the frst observation of the associated production of J/ψ and Υ(1S) in proton-proton collisions. Diferential cross-sections are measured as functions of variables that are sensitive to kinematic correlations between the J/ψ and Υ(1S) mesons. The efective 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.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- Contributing Organization:
- The LHCb collaboration
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 2422882
- Journal Information:
- Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 8 Vol. 2023; ISSN 1029-8479
- Publisher:
- Springer NatureCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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