2009/06/15 by P. Guptaroy, Tarun K. Garain, Goutam Sau +2 · 1 citation
Physics and Astronomy · #hep-ph
published as Hadronic Journal 32 (2009) 95. · 24 Pages, 14 Figures
arxiv created 2009/06/15 · arxiv updated 2009/12/01
We have attempted to develop here tentatively a model for J/Ψ production in p+p, d+Au, Cu + Cu and Au + Au collisions at RHIC energies on the basic ansatz that the results of nucleus-nucleus collisions could be arrived at from the nucleon-nucleon (p + p)-interactions with induction of some additional specific features of high energy nuclear collisions. Based on the proposed new and somewhat unfamiliar model, we have tried (i) to capture the properties of invariant pT -spectra for J/Ψ meson production; (ii) to study the nature of centrality dependence of the pT -spectra; (iii) to understand the rapidity distributions; (iv) to obtain the characteristics of the average transverse momentum < pT > and the values of < pT2 > as well and (v) to trace the nature of nuclear modification factor. The alternative approach adopted here describes the data-sets on the above-mentioned various observables in a fairly satisfactory manner. And, finally, the nature of J/Ψ-production at Large Hadron Collider(LHC)-energies deduced on the basis of our chosen model has been presented in a predictive way against the RHIC-yields, both calculated for the most central collisions and on the same model.