Hadron production in non linear relativistic mean field models

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Authors
Chiapparini, M.
Bracco, M. E.
Delfino, A.
Malheiro, M.
Menezes, D. P.
Providencia, C.
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Abstract
Description
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.
Comment: 18 pages, 2 figures
Keywords
High Energy Physics - Phenomenology
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