期刊
NUCLEAR PHYSICS A
卷 826, 期 1-2, 页码 178-189出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nuclphysa.2009.05.002
关键词
Relativistic mean field models; Hadron production; Relativistic heavy ion collisions
资金
- CNPq (Brazil)
- FEDER/FCT(Portugal) [PTDC/FIS/64707/2006]
- Fundação para a Ciência e a Tecnologia [PTDC/FIS/64707/2006] Funding Source: FCT
By using a parametrization of the non-linear Walecka model which takes into account the binding energy of different hyperons, we present a study of particle production yields measured in central Au-Au collision at RHIC. Two sets of different hyperon-meson coupling constants are employed in obtaining the hadron production and chemical freeze-out parameters. These quantities show a weak dependence on the used hyperon-meson couplings. Results are in good overall accordance with experimental data. We have found that the repulsion among the baryons is quite small and, through a preliminary analysis of the effective mesonic masses, we suggest a way to improve the fittings. (C) 2009 Elsevier B.V. All rights reserved.
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