Europhys. Lett.
Volume 75, Number 3, August 2006
Page(s) 420 - 426
Section The physics of elementary particles and fields
Published online 30 June 2006
Europhys. Lett., 75 (3), pp. 420-426 (2006)
DOI: 10.1209/epl/i2006-10119-4

Condition driving chemical freeze-out

A. Tawfik

University of Bielefeld - P.O. Box 100131, D-33501 Bielefeld, Germany

received 23 March 2006; accepted in final form 1 June 2006
published online 30 June 2006

We propose that it is the entropy density, which characterizes the chemical freeze-out of hadrons in heavy-ion collision experiments. Taking its value from lattice QCD calculations at zero chemical potential, we find that it is excellent in reproducing all experimentally estimated statistical freeze-out parameters, temperature and baryochemical potential. We consistently review the quality of the earlier proposed suggestions.

12.40.Ee - Statistical models.
12.40.Yx - Hadron mass models and calculations.
05.70.Ce - Thermodynamic functions and equations of state.

© EDP Sciences 2006