Ashwini Kumar, B. K. Singh, P. K. Srivastava, C. P. Singh
In this paper, we propose a parameterization which is based on a phenomenological model involving the wounded quarks interactions for explaining the average charged particle multiplicity $< n_{ch}>$ and the central pseudo-rapidity density $< (dn/d\eta)_{\eta=0}>$ and their variations with the center-of-mass energies ($\sqrt{s_{NN}}$) in relativistic heavy-ion collider experiments. The model also interrelates nucleus-nucleus (A-A) collisions with p-A and p-p interactions. Our parameterization rests on simple assumptions regarding mean number of participating quarks and their average number of collisions. The results for $< n_{ch}>$ and their variations with the mass number of colliding nuclei and $\sqrt{s_{NN}}$ are well supported by the experimental data. The results obtained from modified Glauber model involving wounded nucleons are also shown for comparison. Finally, we give the predictions from our model for A-A collisions at the Large Hadron Collider (LHC) and Compressed Baryonic Matter (CBM) experiments. Our results indicate towards a possible universal production mechanism existent for p-p, p-A and A-A collisions.
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http://arxiv.org/abs/1210.1323
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