1202.4857 (X. Wang et al.)

On the Energy and Centrality Dependence of Higher Order Moments of
Net-Proton Distributions in Relativistic Heavy Ion Collisions    [PDF]

X. Wang, C. B. Yang

The higher order moments of the net-baryon distributions in relativistic
heavy ion collisions are useful probes for the QCD critical point and
fluctuations. Within a simple model we study the colliding energy and
centrality dependence of the net-proton distributions in the central rapidity
region. The model is based on considering the baryon stopping and pair
production effects in the processes. Based on some physical reasoning, the
dependence is parameterized. Predictions for the net-proton distributions for
Au+Au and Pb+Pb collisions at different centralities at $\sqrt{s_{NN}}$=39 and
2760 GeV, respectively, are presented from the parameterizations for the model
parameters. A possible test of our model is proposed from investigating the net
proton distributions in the non-central rapidity region for different colliding
centralities and energies.

View original: http://arxiv.org/abs/1202.4857