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arXiv · 1208.2736

J/$ψ$ production at high transverse momenta in p+p and Au+Au collisions at sqrt(s_{NN}) = 200 GeV

STAR Collaboration
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Abstract

We report $J/ψ$ spectra for transverse momenta $p_T$> 5 GeV/$c$ at mid-rapidity in p+p and Au+Au collisions at sqrt(s_{NN}) = 200 GeV.The inclusive $J/ψ$ spectrum and the extracted $B$-hadron feed-down are compared to models incorporating different production mechanisms. We observe significant suppression of the $J/ψ$ yields for $p_T$> 5 GeV/$c$ in 0-30% 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% collisions, no such suppression is observed.The level of suppression is consistently less than that of high-$p_T$ $π^{\pm}$ and low-$p_T$ $J/ψ$.

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STAR Collaboration. 2014-08-11. J/$ψ$ production at high transverse momenta in p+p and Au+Au collisions at sqrt(s_{NN}) = 200 GeV. https://doi.org/10.1016/j.physletb.2013.04.010

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