Bottomium suppression in PbPb collisions at LHC energies

Abstract

We substantially refine our previously developed model for the suppression of Upsilon mesons in the quark-gluon plasma (QGP) formed in 2.76 TeV PbPb collisions at the LHC. It accounts for gluodissociation of the six bottomium states Y(nS), chi_b(nP) with n = 1,2,3, collisional damping of these states as described in a complex potential, screening of the real part of the potential, and the subsequent decay cascade. In the hydrodynamical calculation of the expanding fireball, we take into account the effect of transverse expansion on the suppression factors, and finite transverse momenta of the heavy mesons in the medium. The running of the coupling is considered, resulting in larger gluodissociation decay widths. The initial central temperature is found to be 550 MeV at 0.1 fm/c. Our results are in good agreement with recent centrality-dependent CMS and ALICE data. The calculated suppression of the excited states relative to the ground state Y(1S) is not strong enough in peripheral collisions. Additional mechanisms are discussed. Predictions for 5.52 TeV are made.

arXiv comment18 pages, 10 figures

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Cited by in corpus (21)

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• Quarkonium In-Medium Transport Equation Derived from First Principles
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• Open Quantum Systems for Quarkonia
• Quarkonium Semiclassical Transport in Quark-Gluon Plasma: Factorization and Quantum Correction
• Non-Abelian Electric Field Correlator at NLO for Dark Matter Relic Abundance and Quarkonium Transport
• In-Medium Y-Suppression and Feed-down in UU and PbPb Collisions
• The Imaginary Potential and Thermal Width of Moving Quarkonium from Holography
• Prospects for quarkonium studies at the high-luminosity LHC
• Centrality and transverse momentum dependent suppression of ${\rm Y}(1S)$ and ${\rm Y}(2S)$ in p$-$Pb and Pb$-$Pb collisions at the CERN Large Hadron Collider
• Charmonium suppression in ultra-relativistic proton-proton collisions at LHC energies: A hint for QGP in small systems
• Electromagnetic field effects on ${\rm Y}$-meson dissociation in PbPb collisions at LHC energies
• Bottomonium spectroscopy in the quark-gluon plasma
• Impact of Medium Anisotropy on Quarkonium Dissociation and Regeneration
• Aspects of relativistic heavy-ion collisions
• Hot-medium effects on ${\rm Y}$ yields in pPb collisions at $\sqrt{s_{\text{NN}}}=8.16$ TeV
• Quarkonium Polarization in Medium from Open Quantum Systems and Chromomagnetic Correlators
• The investigation of quark - antiquark potential in plasma with hyperscaling violation background
• Spin alignment of Quarkonia: A Possible Probe of Deconfined QCD matter in Pb+Pb Collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• In-medium Y(1S,2S,3S) suppression in Pb-Pb collisions at sqrt(s_NN)=5.02 TeV
• Applicability of Hydrodynamics in Hadronic Phase of Heavy-Ion Collisions