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Physics Letters B 722 (2013) 55-62
J/$\psi$ production at high transverse momenta in p+p and Au+Au collisions at sqrt(s_{NN}) = 200 GeV
L. Adamczyk, W. Borowski1, S. Kabana1
STAR Collaboration(s)
(2013)

We report $J/\psi$ 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 $J/\psi$ 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 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-$p_T$ $\pi^{\pm}$ and low-$p_T$ $J/\psi$.
1 :  SUBATECH - Laboratoire SUBATECH Nantes
Physique/Physique des Hautes Energies - Expérience

Physique/Physique Nucléaire Expérimentale
Lien vers le texte intégral : 
http://fr.arXiv.org/abs/1208.2736