$J/\psi$ Production versus Centrality, Transverse Momentum, andRapidity in $\mathrm{Au}+\mathrm{Au}$ Collisions at $\sqrt{s_{NN}}=200\mathrm{GeV}$

The PHENIX experiment at the BNL Relativistic Heavy Ion Collider (RHIC) has measured $J/\psi$ production for rapidities $-2.2<y<2.2$ in $\mathrm{Au}+\mathrm{Au}$ collisions at $\sqrt{s_{NN}}=200\mathrm{GeV}$. The $J/\psi$ invariant yield and nuclear modification factor $R_{AA}$ as a function of centrality, transverse momentum, and rapidity are reported. A suppression of $J/\psi$ relative to binary collision scaling of proton-proton reaction yields is observed. Models which describe the lower energy $J/\psi$ data at the CERN Super Proton Synchrotron invoking only $J/\psi$ destruction based on the local medium density predict a significantly larger suppression at RHIC and more suppression at midrapidity than at forward rapidity. Both trends are contradicted by our data.

Figure 1

$J/\psi$ invariant yield versus $p_T$ for different centrality bins in $\mathrm{Au}+\mathrm{Au}$ collisions and in $p+p$ collisions [19]. The left (right)panel corresponds to mid (forward) rapidity. See text for description of theerrors and Ref. [21] fordata tables.

Figure 2

$J/\psi$ invariant yield versus $y$ fordifferent centrality bins in $\mathrm{Au}+\mathrm{Au}$ collisions and for $p+p$ collisions. Open (solid) circles are for mid (forward)rapidity $\mathrm{Au}+\mathrm{Au}$ data. Black squares are for $p+p$ data [19]. See text for descriptionof the errors and Ref. [21] fordata tables.

Figure 3

$J/\psi$ $R_{AA}$ versus $p_T$ for several centrality bins in $\mathrm{Au}+\mathrm{Au}$ collisions. Mid (forward) rapidity data are shown withopen (solid) circles. See text for description of the errors and Ref. [21] for data tables.

Figure 4

$J/\psi$ $R_{AA}$ versus $y$ fordifferent centrality bins. Open (solid) circles are for mid (forward) rapidity.See text for description of the errors and Ref. [21] for data tables.

Figure 5

(a) $J/\psi$ $R_{AA}$ versus $N_{\mathrm{part}}$ for $\mathrm{Au}+\mathrm{Au}$ collisions. Mid (forward) rapidity data are shown withopen (solid) circles. (b) Ratio of forward or midrapidity $J/\psi$ $R_{AA}$ versus $N_{\mathrm{part}}$. For the two most central bins, midrapidity pointshave been combined to form the ratio with the forward rapidity points. Seetext for description of the errors and Ref. [21] for data tables.