Strange Messages: Chemical and Thermal Freeze-out in Nuclear Collisions

Details Strange Messages: Chemical and Thermal Freeze-out in Nuclear Collisions Strange Messages: Chemical and Thermal Freeze-out in Nuclear Collisions

1998-10-19

arxiv.org/abs/nucl-th/9810056v2

J.Phys.G25:263-274,1999

Physics

Nuclear Physics

Nuclear Theory

15 pages, 2 figures, talk given at Strange Quark Matter '98, Padova, Italy, 20-24 July 1998, to be published in J. Phys. G 25;

Scientific paper

10.1088/0954-3899/25/2/014

Thermal models are commonly used to interpret heavy-ion data on particle yields and spectra and to extract the conditions of chemical and thermal freeze-out in heavy-ion collisions. I discuss the usefulness and limitations of such thermal model analyses and review the experimental and theoretical evidence for thermalization in nuclear collisions. The crucial role of correlating strangeness production data with single particle spectra and two-particle correlation measurements is pointed out. A consistent dynamical picture for the heavy-ion data from the CERN SPS involves an initial prehadronic stage with deconfined color and with an appreciable isotropic pressure component. This requires an early onset of thermalization.

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