$J/\psi$ production at low $p_T$ in Au + Au and Cu + Cu collisions at $\sqrt{s_{NN}}=200$ GeV with the STAR detector

The STAR collaboration
Phys.Rev.C 90 (2014) 024906, 2014.

Abstract (data abstract)
The $J/\psi$ $p_T$ spectrum and nuclear modification factor ($R_{AA}$) are reported for $p_T$ < 5 GeV/c and |y|<1 from 0% to 60% central Au+Au and Cu+Cu collisions at $\sqrt{s_{NN}}$ = 200 GeV at STAR. A significant suppression of $p_T$-integrated $J/\psi$ production is observed in central Au+Au events. The Cu+Cu data are consistent with no suppression, although the precision is limited by the available statistics. $R_{AA}$ in Au+Au collisions exhibits a strong suppression at low transverse momentum and gradually increases with $p_T$. The data are compared to high-$p_T$ STAR results and previously published BNL Relativistic Heavy Ion Collider results. Comparing with model calculations, it is found that the invariant yields at low $p_T$ are significantly above hydrodynamic flow predictions but are consistent with models that include color screening and regeneration.

  • Figure 9a

    Data from Figure 9a (Table 4)

    10.17182/hepdata.99158.v1/t1

    The invariant yield versus transverse momentum for |y| < 1 in 0-20% centrality in Au+Au collisions (solid circles). The results...

  • Figure 9b

    Data from Figure 9b (Table 4)

    10.17182/hepdata.99158.v1/t2

    The invariant yield versus transverse momentum for |y| < 1 in 20-40% centrality in Au+Au collisions (solid circles). The results...

  • Figure 9c

    Data from Figure 9c (Table 4)

    10.17182/hepdata.99158.v1/t3

    The invariant yield versus transverse momentum for |y| < 1 in 40-60% centrality in Au+Au collisions (solid circles). The results...

  • Figure 9d

    Data from Figure 9d (Table 4)

    10.17182/hepdata.99158.v1/t4

    The invariant yield versus transverse momentum for |y| < 1 in 0-60% centrality in Au+Au collisions (solid circles). The results...

  • Figure 12a

    Data from Figure 12a (Table 4)

    10.17182/hepdata.99158.v1/t5

    The $J/\psi$ nuclear modification factor versus transverse momentum for |y| < 1 and $p_T$ < 5 GeV/c for 0-60% centrality...

  • Figure 12b

    Data from Figure 12b (Table 4)

    10.17182/hepdata.99158.v1/t6

    The $J/\psi$ nuclear modification factor versus transverse momentum for |y| < 1 and $p_T$ < 5 GeV/c for 0-20% centrality...

  • Figure 12c

    Data from Figure 12c (Table 4)

    10.17182/hepdata.99158.v1/t7

    The $J/\psi$ nuclear modification factor versus transverse momentum for |y| < 1 and $p_T$ < 5 GeV/c for 20-40% centrality...

  • Figure 12d

    Data from Figure 12d (Table 4)

    10.17182/hepdata.99158.v1/t8

    The $J/\psi$ nuclear modification factor versus transverse momentum for |y| < 1 and $p_T$ < 5 GeV/c for 40-60% centrality...

  • Table 5

    Table V

    10.17182/hepdata.99158.v1/t9

    The $J/\psi$ invariant yield and nuclear modification factor as a function of centrality for |y| < 1 in Au+Au collisions...

  • Table 6

    Table VI

    10.17182/hepdata.99158.v1/t10

    The $J/\psi$ invariant yield $Bd^2N/(2\pi p_Tdydp_T) [(GeV/c)^{-2}]$ and nuclear modification factor as a function of transverse momentum for |y| <...

  • Table 7

    Table VII

    10.17182/hepdata.99158.v1/t11

    The $J/\psi$ invariant yield and nuclear modification factor for |y| < 1 in Cu+Cu collisions at $\sqrt{s_{NN}}$ = 200 GeV.

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