Thermal analysis of particle ratios and p_T spectra at RHIC

Details Thermal analysis of particle ratios and p_T spectra at RHIC Thermal analysis of particle ratios and p_T spectra at RHIC

2001-06-05

arxiv.org/abs/nucl-th/0106009v2

Acta Phys.Polon.B33:761-769,2002

Physics

Nuclear Physics

Nuclear Theory

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Scientific paper

The thermal model of particle production is used to analyze the particle ratios and the p_T spectra measured recently at RHIC. Our fit of the particle ratios yields the temperature at the chemical freeze-out T_chem = 165 +- 7 MeV with the corresponding baryon chemical potential mu^B_chem = 41 +- 5 MeV. The quality of the fit shows that the model works well for RHIC. The p_T spectra are evaluated in an approach which takes into account the modifications of the initial thermal distributions by the secondary decays of resonances. All two- and three-body decays are included. This leads to an effective ``cooling'' of the spectra in the data region by about 35-40 MeV. We find that the pion spectrum is characterized by the inverse slope which agrees well with the value inferred from the RHIC data.

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