Monday, February 11, 2013

1208.4107 (V. V. Begun et al.)

Hadron-Resonance Gas at Freeze-out: Reminder on Importance of Repulsive
Interactions
   [PDF]

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.
View original: http://arxiv.org/abs/1208.4107

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