# $J/\psi$ Production in $\sqrt{s_{NN}}$= 200 GeV Cu+Cu Collisions

Abstract : Yields for $/\psi$ production in Cu+Cu collisions at sqrt (s_NN)= 200 GeV have been measured by the PHENIX experiment over the rapidity range |y| < 2.2 at transverse momenta from 0 to beyond 5 GeV/c. The invariant yield is obtained as a function of rapidity, transverse momentum and collision centrality, and compared with results in p+p and Au+Au collisions at the same energy. The Cu+Cu data provide greatly improved precision over existing Au+Au data for $/\J/psi$ production in collisions with small to intermediate numbers of participants, providing a key constraint that is needed for disentangling cold and hot nuclear matter effects.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00202683
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Submitted on : Monday, January 7, 2008 - 5:06:16 PM
Last modification on : Sunday, June 26, 2022 - 11:47:50 AM

### Citation

A. Adare, S. Afanasiev, C. Aidala, N.N. Ajitanand, Y. Akiba, et al.. $J/\psi$ Production in $\sqrt{s_{NN}}$= 200 GeV Cu+Cu Collisions. Physical Review Letters, American Physical Society, 2008, 101, pp.122301. ⟨10.1103/PhysRevLett.101.122301⟩. ⟨in2p3-00202683⟩

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