CHEMICAL FREEZE-OUT CONDITIONS IN CENTRAL S-S COLLISIONS AT 200-A GEV

被引：104

作者：

SOLLFRANK, J

GAZDZICKI, M

HEINZ, U

RAFELSKI, J

机构：

[1] UNIV FRANKFURT,INST KERNPHYS,D-60486 FRANKFURT,GERMANY

[2] INST EXPTL PHYS,PL-00681 WARSAW,POLAND

[3] UNIV ARIZONA,DEPT PHYS,TUCSON,AZ 85721

来源：

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS | 1994年 / 61卷 / 04期

关键词：

D O I：

10.1007/BF01552632

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We determine the chemical freeze-out parameters of hadronic matter formed in central S-S collisions at 200 A GeV, analyzing data from the NA35 collaboration at CERN. In particular we study the quark (baryon number) and strange quark fugacities, as well as the strange quark phase-space occupancy and the freeze-out temperature. The strange quark chemical potential is found to be consistent with zero, and the strange quark abundance is found to be saturated as would be expected for the deconfined phase. We study the stability of our results against variations in the analysis procedure and with respect to a restriction of the data to the central rapidity region. The same analysis applied to nucleon-nucleon data yields significantly different freeze-out parameters, in particular regarding the degree of strangeness saturation.

引用

页码：659 / 665

页数：7

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