2014/04/12 by Partha Pratim Bhaduri, Bhaduri, Partha Pratim, A. K. Chaudhuri +3
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th) #hep-ph #nucl-th
paper · pdf · doi:10.48550/arxiv.1404.3260
8 pages, 22 figures. Accepted for publication in Physical Review C
arxiv created 2014/04/12 · arxiv updated 2014/04/15
We have analyzed the data on J/ψ-to-Drell-Yan production cross section ratio in proton-nucleus (p+A) and nucleus-nucleus (A+A) collisions, measured by the NA50 collaboration in the SPS energy domain. Two component QVZ model has been employed to calculate J/ψ production cross sections. For both J/ψ and Drell-Yan production, nuclear modifications to the free nucleon structure functions are taken into account. In heavy-ion collisions, such modifications are assumed to be proportional to the local nuclear density resulting in centrality dependent initial state effects. Differences in quark and gluon shadowing leads to a new source of impact parameter dependence of the J/ψ to Drell-Yan production ratio. For J/ψ, final state interaction of the produced cc pairs with the nuclear medium is also taken into account. A satisfactory description of the data in both p+A and A+A collisions is obtained. Role of the shadowing corrections are investigated in detail. Model calculations are extrapolated to predict the centrality dependence of J/ψ-to-Drell-Yan ratio in the FAIR energy regime.