HAL : in2p3-00724003, version 1
 arXiv : 1208.2736
 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
 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-$p_T$ $J/\psi$.
 Thème(s) : Physique/Physique des Hautes Energies - ExpériencePhysique/Physique Nucléaire Expérimentale
 Lien vers le texte intégral : http://fr.arXiv.org/abs/1208.2736
 in2p3-00724003, version 1 http://hal.in2p3.fr/in2p3-00724003 oai:hal.in2p3.fr:in2p3-00724003 Contributeur : Dominique Girod <> Soumis le : Jeudi 16 Août 2012, 13:13:38 Dernière modification le : Lundi 24 Juin 2013, 14:32:20