Observation of the ${\rm Y}$(3S) meson and suppression of ${\rm Y}$ states in PbPb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV

Abstract

The production of ${\rm Y}$(2S) and ${\rm Y}$(3S) mesons in lead-lead (PbPb) and proton-proton (pp) collisions is studied in their dimuon decay channel using the CMS detector at the LHC. The ${\rm Y}$(3S) meson is observed for the first time in PbPb collisions, with a significance above five standard deviations. The ratios of yields measured in PbPb and pp collisions are reported for both the ${\rm Y}$(2S) and ${\rm Y}$(3S) mesons, as functions of transverse momentum and PbPb collision centrality. These ratios, when appropriately scaled, are significantly less than unity, indicating a suppression of ${\rm Y}$ yields in PbPb collisions. This suppression increases from peripheral to central PbPb collisions. Furthermore, the suppression is stronger for ${\rm Y}$(3S) mesons compared to ${\rm Y}$(2S) mesons, extending the pattern of sequential suppression of quarkonium states in nuclear collisions previously seen for the $\psi$/J, $\psi$(2S), ${\rm Y}$(1S), and ${\rm Y}$(2S) mesons.

arXiv commentReplaced with the published version. Added the journal reference and the DOI. All the figures and tables, including additional supplementary figures and tables, can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/HIN-21-007 (CMS Public Pages)

References in corpus (56)

• An Introduction to PYTHIA 8.2
• Asymptotic formulae for likelihood-based tests of new physics
• The CMS trigger system
• Description and performance of track and primary-vertex reconstruction with the CMS tracker
• Observation and studies of jet quenching in PbPb collisions at nucleon-nucleon center-of-mass energy = 2.76 TeV
• Decoding the phase structure of QCD via particle production at high energy
• Heavy-flavour and quarkonium production in the LHC era: from proton-proton to heavy-ion collisions
• Performance of electron reconstruction and selection with the CMS detector in proton-proton collisions at sqrt(s) = 8 TeV
• (Non)Thermal Aspects of Charmonium Production and a New Look at J/$\psi$ Suppression
• Performance of the CMS muon detector and muon reconstruction with proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Enhanced J/Psi Production in Deconfined Quark Matter
• Real-time static potential in hot QCD
• Static quark-antiquark pairs at finite temperature
• Extraction and validation of a new set of CMS PYTHIA8 tunes from underlying-event measurements
• A model of jet quenching in ultrarelativistic heavy ion collisions and high-pt hadron spectra at RHIC
• Performance of the CMS Level-1 trigger in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Precision luminosity measurement in proton-proton collisions at $\sqrt{s}=$ 13 TeV in 2015 and 2016 at CMS
• Transverse momentum and pseudorapidity distributions of charged hadrons in pp collisions at sqrt(s) = 0.9 and 2.36 TeV
• Colour Deconfinement and Quarkonium Binding
• Performance of photon reconstruction and identification with the CMS detector in proton-proton collisions at sqrt(s) = 8 TeV
• Quarkonium Interactions in Hadronic Matter
• Charged-particle nuclear modification factors in PbPb and pPb collisions at sqrt(s[NN]) = 5.02 TeV
• J/psi suppression at forward rapidity in Au+Au collisions at sqrt(s_NN)=200 GeV
• Quarkonium suppression in heavy-ion collisions: an open quantum system approach
• Heavy Quarkonium in Extreme Conditions
• Bottomonia in the Quark-Gluon Plasma and their Production at RHIC and LHC
• Heavy Quarkonium in a weakly-coupled quark-gluon plasma below the melting temperature
• Color Screening and Regeneration of Bottomonia in High-Energy Heavy-Ion Collisions
• Measurement of nuclear modification factors of ${\rm Y}$(1S), ${\rm Y}$(2S), and ${\rm Y}$(3S) mesons in PbPb collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}=$ 5.02 TeV
• Measurement of prompt and nonprompt charmonium suppression in PbPb collisions at 5.02 TeV
• Measurement of the Y(1S), Y(2S), and Y(3S) polarizations in pp collisions at sqrt(s) = 7 TeV
• Suppression of Upsilon Production in d+Au and Au+Au Collisions at sqrt(s_NN) = 200 GeV
• Heavy quark bound states in a quark-gluon plasma: dissociation and recombination
• Prompt and non-prompt $J/\psi$ and $\psi (2\mathrm{S})$ suppression at high transverse momentum in 5.02 TeV Pb+Pb collisions with the ATLAS experiment
• Handling uncertainties in background shapes: the discrete profiling method
• Coupled Boltzmann Transport Equations of Heavy Quarks and Quarkonia in Quark-Gluon Plasma
• Progress in the Glauber model at collider energies
• Is bottomonium suppression in proton-nucleus and nucleus-nucleus collisions at LHC energies due to the same effects?
• Measurement of ${\rm Y}$(1S+2S+3S) production in $p$$+$$p$ and Au$+$Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Schwinger Effect by an $SU(2)$ Gauge Field during Inflation
• Measurement of inclusive $J/\psi$ suppression in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV through the dimuon channel at STAR
• First measurement of quarkonium polarization in nuclear collisions at the LHC
• Measurement of the azimuthal anisotropy of ${\rm Y}$(1S) and ${\rm Y}$(2S) mesons in PbPb collisions at $\sqrt{s_{\mathrm{NN}}}=$ 5.02 TeV
• Regeneration of bottomonia in an open quantum systems approach
• Performance of the CMS muon trigger system in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Studies of J/$\psi$ production at forward rapidity in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• ${\rm Y}$ production and nuclear modification at forward rapidity in Pb-Pb collisions at $\sqrt{{\text{s}}_{\text{NN}}}=5.02$ TeV
• Measurement of sequential ${\rm Y}$ suppression in Au+Au collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}$ = 200 GeV with the STAR experiment
• Measurement of the ${\rm Y}$ polarizations in $pp$ collisions at $\sqrt{s}$=7 and 8TeV
• Nuclear modification of ${\rm Y}$ states in pPb collisions at $\sqrt{s_{\mathrm{NN}}}=$ 5.02 TeV
• Production of ${\rm Y}(\text{nS})$ mesons in Pb+Pb and $pp$ collisions at 5.02 TeV
• $\psi (2S)$ suppression in Pb-Pb collisions at the LHC
• Fragmentation of jets containing a prompt J$/\psi$ meson in PbPb and pp collisions at $\sqrt{s_{\mathrm{NN}}}=$ 5.02 TeV
• Y(nS) polarizations versus particle multiplicity in pp collisions at sqrt(s) = 7 TeV
• Bottomonium spectroscopy in the quark-gluon plasma
• The fate of quarkonia in heavy-ion collisions at LHC energies: a unified description of the sequential suppression patterns

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