J/ψ Production and Nuclear Effects for d+Au and p+p Collisions at sNN=200GeV

S. S. Adler et al. (PHENIX Collaboration)
Phys. Rev. Lett. 96, 012304 – Published 10 January 2006

Abstract

J/ψ production in d+Au and p+p collisions at sNN=200GeV has been measured by the PHENIX experiment at rapidities 2.2<y<+2.4. The cross sections and nuclear dependence of J/ψ production versus rapidity, transverse momentum, and centrality are obtained and compared to lower energy p+A results and to theoretical models. The observed nuclear dependence in d+Au collisions is found to be modest, suggesting that the absorption in the final state is weak and the shadowing of the gluon distributions is small and consistent with Dokshitzer-Gribov-Lipatov-Altarelli-Parisi-based parametrizations that fit deep-inelastic scattering and Drell-Yan data at lower energies.

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  • Received 28 July 2005

DOI:https://doi.org/10.1103/PhysRevLett.96.012304

©2006 American Physical Society

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Vol. 96, Iss. 1 — 13 January 2006

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