Nihar R. Sahoo, Sudipan De, Tapan K. Nayak
Lattice QCD models predict the presence of a critical point in the QCD phase diagram where the first order phase transition between the hadron gas and Quark-Gluon Plasma ceases to exist. Higher moments of conserved quantities, such as net-charge, net-baryon number and net-strangeness, and their products, are proposed as sensitive probes for locating the critical point. The higher moments of net-charge multiplicity distributions have been studied for RHIC energies for Au-Au collisions at $\sqrt{s_{\rm NN}}$ = 7.7 to 200 GeV using three event generators, viz., HIJING, UrQMD and THERMINATOR-2. We discuss the effects of centrality selection, resonance production, as well as different particle species on the net-charge moments and their products. Finally, we present the model predictions on higher moments which set the baseline for measurements at RHIC.
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http://arxiv.org/abs/1210.7206
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