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Energy dependence of $J/\psi$ production in Au+Au collisions at $\sqrt{s_{NN}} =$ 39, 62.4 and 200 GeV

The STAR collaboration
Phys.Lett.B 771 (2017) 13-20, 2017.

Abstract
The inclusive $J/\psi$ transverse momentum ($p_{T}$) spectra and nuclear modification factors are reported at midrapidity ($|y|<1.0$) in Au+Au collisions at $\sqrt{s_{NN}}=$ 39, 62.4 and 200 GeV taken by the STAR experiment. A suppression of $J/\psi$ production, with respect to {\color{black}the production in $p+p$ scaled by the number of binary nucleon-nucleon collisions}, is observed in central Au+Au collisions at these three energies. No significant energy dependence of nuclear modification factors is found within uncertainties. The measured nuclear modification factors can be described by model calculations that take into account both suppression of direct $J/\psi$ production due to the color screening effect and $J/\psi$ regeneration from recombination of uncorrelated charm-anticharm quark pairs.

  • Figure 2(a)

    10.17182/hepdata.104506.v1/t1

    J/psi invariant yields in Au+Au collisions = 39 GeV as a function of pT for different centralities.

  • Figure 2(b)

    10.17182/hepdata.104506.v1/t2

    J/psi invariant yields in Au+Au collisions = 62.4 GeV as a function of pT for different centralities.

  • Figure 2(c)

    10.17182/hepdata.104506.v1/t3

    J/psi invariant yields in Au+Au collisions = 200 GeV as a function of pT for different centralities.

  • Figure 3

    10.17182/hepdata.104506.v1/t4

    J/psi RCP results (with respect to 40−60% peripheral) for Au+Au collisions (39, 62.4 and 200 GeV) as a function of...

  • Figure 4(a)

    10.17182/hepdata.104506.v1/t5

    J/psi RCP results for Au+Au collisions (39, 62.4 and 200 GeV) as a function of Npart.

  • Figure 4(b)

    10.17182/hepdata.104506.v1/t6

    J/psi RCP results for Au+Au collisions (39, 62.4 and 200 GeV) as a function of pT.

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