V. V. Begun, M. Gaździcki, M. I. Gorenstein
Strong interactions between hadrons include attractive and repulsive components. In statistical approaches attractive interactions are modelled by including resonances while repulsive interactions by taking into account a finite proper volume of particles. In this paper the influence of repulsive interactions on matter properties is considered within the excluded volume van der Waals hadron-resonance gas. Quantitative results are presented for matter at the chemical freeze-out in central nucleus-nucleus collisions at relativistic energies. In particular, it is shown that repulsive interactions connected to non-zero size of created particles lead to a significant decrease of collision energy at which the net-baryon density has a maximum.
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http://arxiv.org/abs/1208.4107
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