Measurement of ${\rm Y}$ production in $pp$ collisions at $\sqrt{s}=5\mathrm{TeV}$

Abstract

The production cross-sections of ${\rm Y}$ mesons, namely ${\rm Y}(1S)$, ${\rm Y}(2S)$ and ${\rm Y}(3S)$, in $pp$ collisions at $\sqrt{s}=5\mathrm{TeV}$ are measured with a data sample corresponding to an integrated luminosity of $9.13\pm 0.18{\mathrm{pb}}^{-1}$ collected by the LHCb detector. The ${\rm Y}$ mesons are reconstructed in the decay mode ${\rm Y}\to {\mu }^{+}{\mu }^{-}$. Double differential cross-sections times branching fractions, as functions of the transverse momentum $p_{\mathrm{T}}$ and the rapidity $y$ of the ${\rm Y}$ mesons, are measured in the range $p_{\mathrm{T}}<20\mathrm{GeV}/c$ and $2.0<y<4.5$. The results integrated over these $p_{\mathrm{T}}$ and $y$ ranges are $\sigma ({\rm Y}(1S))\times \mathcal{B}({\rm Y}(1S)\to {\mu }^{+}{\mu }^{-})=2101\pm 33\pm 83\mathrm{pb},$ $\sigma ({\rm Y}(2S))\times \mathcal{B}({\rm Y}(2S)\to {\mu }^{+}{\mu }^{-})=526\pm 20\pm 21\mathrm{pb},$ $\sigma ({\rm Y}(3S))\times \mathcal{B}({\rm Y}(3S)\to {\mu }^{+}{\mu }^{-})=242\pm 16\pm 10\mathrm{pb},$ where the first uncertainties are statistical and the second are systematic. The ratios of cross-sections between measurements of two different ${\rm Y}$ states and between measurements at different center-of-mass energies are determined. The nuclear modification factor of ${\rm Y}(1S)$ at $\sqrt{s}=5\mathrm{TeV}$ is updated as well using the directly measured cross-section results from this analysis.

arXiv commentAll figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-036.html (LHCb public pages)

References in corpus (16)

• 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
• sPlot: a statistical tool to unfold data distributions
• Color-octet quarkonia production
• Color-octet quarkonia production II
• Measurement of the track reconstruction efficiency at LHCb
• Precision luminosity measurements at LHCb
• Heavy-quarkonium suppression in p-A collisions from parton energy loss in cold QCD matter
• Selection and processing of calibration samples to measure the particle identification performance of the LHCb experiment in Run 2
• Improved performance of the LHCb Outer Tracker in LHC Run 2
• Towards the experimental clarification of quarkonium polarization
• Tesla : an application for real-time data analysis in High Energy Physics
• Performance of the Muon Identification at LHCb
• An Updated Study for ${\rm Y}$ Production and Polarization at the Tevatron and LHC

Cited by in corpus (3)

• Fragmentation of fully heavy tetraquarks: The TQ4Q1.1 functions as a case study
• Pseudoscalar heavy-quarkonium hadroproduction from nonrelativistic fragmentation at NLL/NLO${}^{+}$
• All-charm tetraquarks at hadron colliders: A high-precision fragmentation perspective