Associated production of prompt $J/\psi$ and ${\rm Y}$ mesons in $pp$ collisions at $\sqrt{s}=13\mathrm{TeV}$

Abstract

The associated production of prompt $J/\psi$ and ${\rm Y}$ mesons in $pp$ collisions at a centre-of-mass energy of $\sqrt{s}=13\mathrm{TeV}$ is studied using LHCb data, corresponding to an integrated luminosity of $4{\mathrm{fb}}^{-1}$. The measurement is performed for $J/\psi$ (${\rm Y}$) mesons with a transverse momentum $p_{\mathrm{T}}<10(30)\mathrm{GeV}/c$ in the rapidity range $2.0<y<4.5$. In this kinematic range, the cross-section of the associated production of prompt $J/\psi$ and ${\rm Y}(1S)$ mesons is measured to be $133\pm 22\pm 7\pm 3\mathrm{pb}$, with a significance of $7.9\sigma$, and that of prompt $J/\psi$ and ${\rm Y}(2S)$ mesons to be $76\pm 21\pm 4\pm 7\mathrm{pb}$, with a significance of $4.9\sigma$. 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 $J/\psi$ and ${\rm Y}(1S)$ in proton-proton collisions. Differential cross-sections are measured as functions of variables that are sensitive to kinematic correlations between the $J/\psi$ and ${\rm Y}(1S)$ mesons. The effective cross-sections of the associated production of prompt $J/\psi$ and ${\rm Y}$ mesons are obtained and found to be compatible with measurements using other particle productions.

arXiv commentAll figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-047.html (LHCb public pages)

References in corpus (32)

• A Brief Introduction to PYTHIA 8.1
• Rigorous QCD Analysis of Inclusive Annihilation and Production of Heavy Quarkonium
• Heavy quarkonium: progress, puzzles, and opportunities
• LHCb Detector Performance
• PHOTOS Monte Carlo: a precision tool for QED corrections in Z and W decays
• sPlot: a statistical tool to unfold data distributions
• Color-octet quarkonia production
• Observation of structure in the $J/\psi$-pair mass spectrum
• J/psi polarization at hadron colliders in nonrelativistic QCD
• Measurement of the track reconstruction efficiency at LHCb
• Polarization for Prompt J/psi, psi(2s) production at the Tevatron and LHC
• Polarization of Prompt J/psi at the Tevatron
• Precision luminosity measurements at LHCb
• Fragmentation contributions to J/psi production at the Tevatron and the LHC
• Fragmentation production of J/psi and psi' at the Tevatron
• New Observables in Inclusive Production of Quarkonia
• ${\eta }_c$ production at the LHC challenges nonrelativistic-QCD factorization
• J/psi-Pair Production at Large Momenta: Indications for Double-Parton Scatterings and Large alpha_s^5 Contributions
• Impact of ${\eta }_c$ hadroproduction data on charmonium production and polarization within NRQCD framework
• Performance of the Muon Identification at LHCb
• Proton Structure in Transverse Space and the Effective Cross Section
• Impact of $J/\psi$ pair production at the LHC and predictions in nonrelativistic QCD
• Scale Factor in Double Parton Collisions and Parton Densities in Transverse Space
• Associated production of a quarkonium and a Z boson at one loop in a quark-hadron-duality approach
• Relativistic Correction to J/psi and Upsilon Pair Production
• Complete Study of Hadroproduction of a ${\rm Y}$ Meson Associated with a Prompt $J/\psi$
• Minijets and the Two-Body Parton Correlation
• Indication for Double Parton Scatterings in W + Prompt J/Psi Production at the LHC
• Phenomenological analysis of associated production of $Z^0+b$ in the $b\to J/\psi X$ decay channel at the LHC
• Breakdown of NRQCD Factorization in Processes Involving Two Quarkonia and its Cure
• $J/\psi$ meson production in association with an open charm hadron at the LHC: A reappraisal
• J/psi production with NRQCD: HERA, Tevatron, RHIC and LHC

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