Thermal analysis of particle ratios and pT spectra at RHIC
Wojciech Florkowski, Wojciech Broniowski, Mariusz Michalec
Abstract
The thermal model of particle production is used to analyze the particle ratios and the pT spectra measured recently at RHIC. Our fit of the particle ratios yields the temperature at the chemical freeze-out Tchem = 165 +- 7 MeV with the corresponding baryon chemical potential muBchem = 41 +- 5 MeV. The quality of the fit shows that the model works well for RHIC. The pT 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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