Universal pion freeze-out in heavy-ion collisions.
Phys Rev Lett
; 90(2): 022301, 2003 Jan 17.
Article
em En
| MEDLINE
| ID: mdl-12570540
ABSTRACT
Based on an evaluation of data on pion interferometry and on particle yields at midrapidity, we propose a universal condition for thermal freeze-out of pions in heavy-ion collisions. We show that freeze-out occurs when the mean free path of pions lambda(f) reaches a value of about 1 fm, which is much smaller than the spatial extent of the system at freeze-out. This critical mean free path is independent of the centrality of the collision and beam energy from the Alternating Gradient Synchrotron to the Relativistic Heavy Ion Collider.
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Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2003
Tipo de documento:
Article