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arXiv · 1403.5744

Separate chemical freeze-out of strange particles with conservation laws

D. R. Oliinychenko·V. V. Sagun·A. I. Ivanytskyi·K. A. Bugaev
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Abstract

The Hadron Resonance Gas Model with two chemical freeze-outs, connected by conservation laws is considered. We are arguing that the chemical freeze-out of strange hadrons should occur earlier than the chemical freeze-out of non-strange hadrons. The hadron multiplicities measured in the heavy ion collisions for the center of mass energy range 2.7 - 200 GeV are described well by such a model. Based on a success of such an approach, a radical way to improve the Hadron Resonance Gas Model performance is suggested. Thus, we suggest to identify the hadronic reactions that freeze-out noticeably earlier or later that most of the others reactions (for different collision energies they may be different) and to consider a separate freeze-out for them.

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D. R. Oliinychenko, V. V. Sagun, A. I. Ivanytskyi, K. A. Bugaev. 2014-03-23. Separate chemical freeze-out of strange particles with conservation laws. https://arxiv.org/abs/1403.5744

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