Hadron production in non linear relativistic mean field models

M. Chiapparini; M. E. Bracco; A. Delfino; M. Malheiro; D. P. Menezes; C. Providencia

doi:10.1016/j.nuclphysa.2009.05.002

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arXiv · 0711.3631

Hadron production in non linear relativistic mean field models

M. Chiapparini·M. E. Bracco·A. Delfino·M. Malheiro·D. P. Menezes·C. Providencia

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Abstract

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.

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M. Chiapparini, M. E. Bracco, A. Delfino, M. Malheiro, D. P. Menezes, C. Providencia. 2009-05-29. Hadron production in non linear relativistic mean field models. https://doi.org/10.1016/j.nuclphysa.2009.05.002

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