Net-proton probability distribution in heavy ion collisions
High Energy Physics - Phenomenology
2013-05-29 v1
Abstract
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 Au-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.
Cite
@article{arxiv.1107.4267,
title = {Net-proton probability distribution in heavy ion collisions},
author = {P. Braun-Munzinger and B. Friman and F. Karsch and K. Redlich and V. Skokov},
journal= {arXiv preprint arXiv:1107.4267},
year = {2013}
}
Comments
4 pages, 2 figures