Impact parameter dependence of the nuclear modification of J/psi production in d+Au collisions at sqrt(S_NN) = 200 GeV

Abstract

The centrality dependence of sqrt(s_NN)= 200 GeV d+Au {J/ψ} data, measured in 12 rapidity bins that span -2.2 < y < 2.4, has been fitted using a model containing an effective absorption cross section combined with EPS09 NLO shadowing. The centrality dependence of the shadowing contribution was allowed to vary nonlinearly, employing a variety of assumptions, in an effort to explore the limits of what can be determined from the data. The impact parameter dependencies of the effective absorption cross section and the shadowing parameterization are sufficiently distinct to be determined separately. It is found that the onset of shadowing is a highly nonlinear function of impact parameter. The mid and backward rapidity absorption cross sections are compared with lower energy data and, for times of 0.05 fm/c or greater, data over a broad range of collision energies and rapidities are well described by a model in which the absorption cross section depends only on time spent in the nucleus.

11 pages, 11 figures. Expanded discussion of methods, and added extensive comparison of effective absorption cross sections with lower energy data, and with theory. Corrected minor typos in table 1, corrected typos in best fit parameters for Fig. 8

References in corpus (9)

• Glauber Modeling in High Energy Nuclear Collisions
• The Color Glass Condensate
• EPS09 - a New Generation of NLO and LO Nuclear Parton Distribution Functions
• Determination of nuclear parton distribution functions and their uncertainties at next-to-leading order
• Heavy-quarkonium suppression in p-A collisions from parton energy loss in cold QCD matter
• Impact-parameter dependent nuclear parton distribution functions: EPS09s and EKS98s and their applications in nuclear hard processes
• Quantitative Constraints on the Transport Properties of Hot Partonic Matter from Semi-Inclusive Single High Transverse Momentum Pion Suppression in Au+Au collisions at sqrt(s_NN) = 200 GeV
• Energy dependence of J/psi absorption in proton-nucleus collisions
• Kinematic distributions and nuclear effects of $J/\psi$ production in 920 GeV fixed-target proton-nucleus collisions

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