$J/\psi$ production in Au+Au collisions at $\sqrt{s} = 54.4$ GeV

Abstract

In this contribution, we present the measurements of inclusive / production at midrapidity (| | < 1.0) in Au+Au collisions at √ NN = 54.4 GeV by the STAR experiment. The dependences of nuclear modification factor ( AA ) on centrality and transverse momentum are measured with improved precision compared to previous measurements at 39 and 62.4 GeV. Combining newly measured AA of / at √ NN = 54.4 GeV and previous results at SPS, RHIC, and LHC energies, no significant energy dependence of AA is found within uncertainties up to 200 GeV. The comparision to model calculations is presented and its physical implications are discussed.