In-Medium Charmonium Production in Proton-Nucleus Collisions

Abstract

We study charmonium production in proton-nucleus ($p$-A) collisions focusing on final-state effects caused by the formation of an expanding medium. Toward this end, we utilize a rate equation approach within a fireball model as previously employed for a wide range of heavy-ion collisions, adapted to the small systems in $p$-A collisions. The initial geometry of the fireball is taken from a Monte-Carlo event generator where initial anisotropies are caused by fluctuations. We calculate the centrality and transverse-momentum dependent nuclear modification factor ($R_{p\mathrm{A}}$) as well as elliptic flow ($v_2$) for both $J/\psi$ and $\psi (2S)$ and compare them to experimental data from RHIC and the LHC. While the $R_{p\mathrm{A}}$s show an overall fair agreement with most of the data, the large $v_2$ values observed in $p$-Pb collisions at the LHC cannot be accounted for in our approach. While the former finding generally supports the formation of a near thermalized QCD medium in small systems, the discrepancy in the $v_2$ suggests that its large observed values are unlikely to be due to the final-state collectivity of the fireball alone.

arXiv comment8 pages, 15 figures; version accepted for publication in JHEP

References in corpus (32)

• Radial and elliptic flow at RHIC: further predictions
• EPS09 - a New Generation of NLO and LO Nuclear Parton Distribution Functions
• Medium Modifications and Production of Charmonia at LHC
• Observable implications of geometrical and dynamical aspects of freeze-out in heavy ion collisions
• Heavy Quark Production in p+p and Energy Loss and Flow of Heavy Quarks in Au+Au Collisions at sqrt(s_NN)=200 GeV
• Charmonium and bottomonium production in heavy-ion collisions
• Centrality dependence of particle production in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$= 5.02 TeV
• Model for $J/\psi$ absorption in hadronic matter
• Heavy Flavor at the Large Hadron Collider in a Strong Coupling Approach
• In-Medium Effects on Charmonium Production in Heavy-Ion Collisions
• Charmonium Suppression and Regeneration from SPS to RHIC
• Sequential Regeneration of Charmonia in Heavy-Ion Collisions
• Charmonium in Medium: From Correlators to Experiment
• Color Screening and Regeneration of Bottomonia in High-Energy Heavy-Ion Collisions
• Quarkonia and Heavy-Quark Relaxation Times in the Quark-Gluon Plasma
• Quarkonia in the Quark Gluon Plasma
• Forward $J/\psi$ production in proton-nucleus collisions at high energy
• Measurement of quarkonium production in proton--lead and proton--proton collisions at $5.02$ $\mathrm{TeV}$ with the ATLAS detector
• Rapidity and transverse-momentum dependence of the inclusive J/$\psi$ nuclear modification factor in p-Pb collisions at $\sqrt{{\text{s}}_{\mathbf{NN}}}=5.02$ TeV
• $T$-matrix Approach to Quark-Gluon Plasma
• Predictions for Cold Nuclear Matter Effects in $p+$Pb Collisions at $\sqrt{s_{{}_{NN}}}=8.16$ TeV
• Centrality dependence of inclusive J/$\psi$ production in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Shadowing Effects on $J/\psi$ and ${\rm Y}$ Production at the LHC
• Forward $J/\psi$ production at high energy: centrality dependence and mean transverse momentum
• Quarkonium suppression in heavy-ion collisions from coherent energy loss in cold nuclear matter
• Phenomenological interpolation of the inclusive J/psi cross section to proton-proton collisions at 2.76 TeV and 5.5 TeV
• Cold and Hot Nuclear Matter Effects on Charmonium Production in p+Pb Collisions at LHC Energy
• Measurement of prompt $\psi$(2S) production cross sections in proton-lead and proton-proton collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}=$ 5.02 TeV
• Theoretical Perspective on Quarkonia from SPS via RHIC to LHC
• Inclusive J/$\psi$ production at forward and backward rapidity in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 8.16 TeV
• Transverse Momentum Dependence of Anomalous J/ψSuppression in Pb-Pb Collisions
• New results on collectivity with ALICE

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• J/$\psi$ production at midrapidity in p$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}}=8.16$ TeV
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