Net-proton probability distribution in heavy ion collisions

P. Braun-Munzinger, B. Friman, F. Karsch, K. Redlich, V. Skokov
2011 Physical Review C  
We compute net-proton probability distributions in heavy ion collisions within the hadron resonance gas model. The model results are compared with data taken by the STAR Collaboration in Au-Au collisions at sqrt(s_NN)= 200 GeV for different centralities. We show that in peripheral Au-Au collisions the measured distributions, and the resulting first four moments of net-proton fluctuations, are consistent with results obtained from the hadron resonance gas model. However, data taken in central
more » ... Au collisions differ from the predictions of the model. The observed deviations can not be attributed to uncertainties in model parameters. We discuss possible interpretations of the observed deviations.
doi:10.1103/physrevc.84.064911 fatcat:klpziuziobgstczra7l3qwtnum