Measurement of inclusive $J/\psi$ production in Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}=54.4$ GeV at STAR

Abstract

This article presents measurements of inclusive $J/\psi$ production at midrapidity ($\left|y\right|<$ 1.0) in Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}=54.4$ GeV with the STAR detector at the Relativistic Heavy Ion Collider. A suppression of the $J/\psi$ yield, quantified using the nuclear modification factors ($R_{\mathrm{AA}}$, $R_{\mathrm{CP}}$), is observed with respect to the scaled production in $p$+$p$ collisions. The dependence of $R_{\mathrm{AA}}$ on collision centrality and $J/\psi$ transverse momentum is measured with improved precision compared to previous measurements at 39 and 62.4 GeV, while the centrality dependence of $R_{\mathrm{CP}}$ is measured and compared to the same results at 39, 62.4, and 200 GeV. In central collisions, no significant collision energy dependence of $R_{\mathrm{AA}}$ is found within uncertainties for collision energies between 17.3 and 200 GeV. Two transport model calculations that include dissociation and regeneration contributions are consistent with the experimental results within uncertainties. Although no significant collision energy dependence of the $J/\psi$ suppression in high energy heavy-ion collisions up to $\sqrt{s_{\mathrm{NN}}}=200$ GeV is observed within uncertainties, the newly measured results at 54.4 GeV Au+Au collisions provide additional constraints on theoretical calculations of the hot medium evolution and cold nuclear matter effects.

published by Physics Letters B

References in corpus (12)

• Systematic Measurements of Identified Particle Spectra in pp, d+Au and Au+Au Collisions from STAR
• J/psi Production in Quark-Gluon Plasma
• Charmonium in Medium: From Correlators to Experiment
• The ALICE experiment: a journey through QCD
• Properties of the QCD Matter -- An Experimental Review of Selected Results from RHIC BES Program
• J/psi Production in sqrt (s_NN)= 200 GeV Cu+Cu Collisions
• High transverse momentum quarkonium production and dissociation in heavy ion collisions
• The STAR Vertex Position Detector
• Centrality and transverse momentum dependence of inclusive J/$\psi$ production at midrapidity in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Measurements of inclusive J/$\psi$ production at midrapidity and forward rapidity in Pb$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Quarkonium measurements in nucleus-nucleus collisions with ALICE
• J/$\psi$ and $\psi$(2S) Production in Small Systems with PHENIX