Abstract：In the context of unified hydrodynamics, we discuss the pseudorapidity distributions of the charged particles produced in Au-Au and Cu-Cu collisions at the low RHIC energies of $\sqrt {s_{\rm NN}}=19.6$ and 22.4 GeV, respectively. It is found that the unified hydrodynamics alone can give a good description to the experimental measurements. This is different from the collisions at the maximum RHIC energy of $\sqrt {s_{\rm NN}}=200$ GeV or at LHC energy of $\sqrt {s_{\rm NN}}=2.76$ TeV, in which the leading particles must be taken into account so that we can properly explain the experimental observations.
(Relativistic heavy-ion collisions (collisions induced by light ions studied to calibrate relativistic heavy-ion collisions should be classified under both 25.75.-q and sections 13 or 25 appropriate to the light ions))
. [J]. 中国物理快报, 2017, 34(5): 52501-.
Zhi-Jin Jiang, Jia-Qi Hui, Hai-Ping Deng. Unified Hydrodynamics and Pseudorapidity Distributions of Charged Particles Produced in Heavy Ion Collisions at Low Energies at RHIC. Chin. Phys. Lett., 2017, 34(5): 52501-.
2017, Vol. 34 
