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

Abstract : 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-$p_T$ $J/\psi$.
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http://hal.in2p3.fr/in2p3-00724003
Contributor : Dominique Girod <>
Submitted on : Thursday, August 16, 2012 - 1:13:38 PM
Last modification on : Thursday, February 7, 2019 - 3:18:46 PM

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L. Adamczyk, W. Borowski, S. Kabana. J/$\psi$ production at high transverse momenta in p+p and Au+Au collisions at sqrt(s_{NN}) = 200 GeV. Physics Letters B, Elsevier, 2013, 722, pp.55-62. ⟨10.1016/j.physletb.2013.04.010⟩. ⟨in2p3-00724003⟩

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