Time dependence of strange baryon freeze-out in relativistic heavy ion collisions - art. no. 054906

Citation
R. Bellwied et al., Time dependence of strange baryon freeze-out in relativistic heavy ion collisions - art. no. 054906, PHYS REV C, 6205(5), 2000, pp. 4906
Citations number
25
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW C
ISSN journal
05562813 → ACNP
Volume
6205
Issue
5
Year of publication
2000
Database
ISI
SICI code
0556-2813(200011)6205:5<4906:TDOSBF>2.0.ZU;2-N
Abstract
We investigate chemical and thermal freeze-out time dependencies of strange baryon production for CERN SPS heavy ion collisions in the framework of a dynamical hadronic transport code. We show that the Lambda yield changes co nsiderably after hadronization in the case of Pb+Pb collisions, whereas for smaller system sizes (e.g., S+S) the direct particle production dominates over production from inelastic rescattering. Chemical freeze-out times for strange baryons in Pb+Pb are smaller than for nonstrange baryons, but they are still sufficiently long for hadronic rescattering to contribute signifi cantly to the final A yield.