Constraints on nuclear gluon densities from J/psi data

Abstract

The gluon density in nuclei, G^A(x), is poorly constrained at all x from the current DIS and Drell-Yan data. In this paper, we point out that J/psi production measured in proton-nucleus collisions at sqrt(s)=38.8 GeV by the E866 collaboration puts stringent constraints on the x-dependence of the G^W/G^Be ratio in the x=0.02-0.1 range. The E866 data suggest a rather mild x-dependence of G^W/G^Be, and consequently tend to favour DS and HKM sets, rather than the DSg, EKS, and EPS parametrizations which exhibit a large shadowing and anti-shadowing.

7 pages, 1 figure

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Cited by in corpus (8)

• Towards an automated tool to evaluate the impact of the nuclear modification of the gluon density on quarkonium, D and B meson production in proton-nucleus collisions
• Charmonium and bottomonium production in heavy-ion collisions
• Leading twist nuclear shadowing phenomena in hard processes with nuclei
• Cold nuclear matter effects on J/psi production: intrinsic and extrinsic transverse momentum effects
• Probing gluon and heavy-quark nuclear PDFs with photon + heavy quark production in pA collisions
• Centrality, Rapidity and Transverse-Momentum Dependence of Cold Nuclear Matter Effects on J/Psi Production in d+Au, Cu+Cu and Au+Au Collisions at sqrt(s_NN)=200 GeV
• Nuclear effects on J/ψ production in proton-nucleus collisions
• Global analysis of J/psi suppression in cold nuclear matter