A combined model for pseudo-rapidity distributions in Cu-Cu collisions at BNL-RHIC energies

作者：Jiang, Z. J.^*; Wang, J.; Huang, Y.

来源：International Journal of Modern Physics E-Nuclear Physics, 2016, 25(4): 1650025.

DOI：10.1142/S0218301316500257

• Unified hydrodynamics
• pseudo-rapidity distribution
• leading particles

The charged particles produced in nucleus-nucleus collisions come from leading particles and those frozen out from the hot and dense matter created in collisions. The leading particles are conventionally supposed having Gaussian rapidity distributions normalized to the number of participants. The hot and dense matter is assumed to expand according to the unified hydrodynamics, a hydro model which unifies the features of Landau and Hwa-Bjorken model, and freeze out into charged particles from a time-like hypersurface with a proper time of tau(FO). The rapidity distribution of this part of charged particles can be derived analytically. The combined contribution from both leading particles and unified hydrodynamics is then compared against the experimental data performed by BNL-RHIC-PHOBOS Collaboration in different centrality Cu-Cu collisions at root(NN)-N-s = 200 and 62.4 GeV, respectively. The model predictions are consistent with experimental measurements.

• 出版日期2016-4
• 单位上海理工大学