Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2001-10-29
Phys.Lett. B527 (2002) 85-91
Physics
Nuclear Physics
Nuclear Theory
6 pages in RevTex format, 5 figures
Scientific paper
10.1016/S0370-2693(02)01179-6
Hadron multiplicity in the central rapidity region of high-energy heavy-ion collisions is investigated within a two-component mini-jet model which consists of soft and semi-hard particle production. The hard contribution from mini-jets is reevaluated using the latest parameterization of parton distributions and nuclear shadowing. The energy dependence of the experimental data from RHIC requires a strong nuclear shadowing of the gluon distribution in this model. The centrality dependence of the hadron multiplicity at $\sqrt{s}=130$ GeV is reproduced well with the impact-parameter dependent parton shadowing. However, energy variation of the centrality dependence is needed to distinguish different particle production mechanisms such as the parton saturation model.
Li Shi-Yuan
Wang Xin-Nian
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