$J/\psi$ production at high transverse momenta in $p+p$ and Au + Au collisions at $\sqrt{s_{\mathrm{NN}}}=200\text{GeV}$

Abstract

We report $J/\psi$ spectra for transverse momenta $p_T>5\text{GeV}/c$ at mid-rapidity in $p+p$ and Au + Au collisions at $\sqrt{s_{\mathrm{NN}}}=200\text{GeV}$. The inclusive $J/\psi$ spectrum and the extracted B-hadron feed-down are compared to models incorporating different production mechanisms. We observe significant suppression of the $J/\psi$ yields for $p_T>5\text{GeV}/c$ in 0–30% central Au + Au collisions relative to the $p+p$ yield scaled by the number of binary nucleon–nucleon collisions in Au + Au collisions. In 30–60% mid-central collisions, no such suppression is observed. The level of suppression is consistently less than that of high-$p_T$ ${\pi }^{\pm }$ and low-$p_T$ $J/\psi$ at RHIC and high-$p_T$ $J/\psi$ at the LHC.