Hadronic freeze-out following a first order hadronization phase transition in ultrarelativistic heavy-ion collisions -: art. no. 021902

被引:82
作者
Bass, SA [1 ]
Dumitru, A
Bleicher, M
Bravina, L
Zabrodin, E
Stöcker, H
Greiner, W
机构
[1] Duke Univ, Dept Phys, Durham, NC 27708 USA
[2] Yale Univ, Dept Phys, New Haven, CT 06520 USA
[3] Goethe Univ Frankfurt, Inst Theoret Phys, D-60054 Frankfurt, Germany
来源
PHYSICAL REVIEW C | 1999年 / 60卷 / 02期
关键词
D O I
10.1103/PhysRevC.60.021902
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
We analyze the hadronic freeze-out in ultrarelativistic heavy-ion collisions at Relativistic Heavy Ion Collider (RHIC) in a transport approach that combines hydrodynamics for the early, dense, deconfined stage of the reaction with a microscopic nonequilibrium model for the later hadronic stage at which the hydrodynamic equilibrium assumptions are not valid. With this ansatz we are able to self-consistently calculate the freeze-out of the system and determine space-time hypersurfaces for individual hadron species. The space-time domains of the freeze-out for several hadron species are found to be actually four dimensional, and differ drastically for the individual hadrons species. Freeze-out radii distributions are similar in width for most hadron species, even though the Omega(-) is found to be emitted rather close to the phase boundary and shows the smallest freeze-out radii and times among all baryon species. The total Lifetime of the system does not change by more than 10% when going from CERN Super Proton Synchrotron to RHIC energies. [S0556-2813(99)50308-7].
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页数:5
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