CHEMICAL RELAXATION-TIMES IN A HADRON GAS AT FINITE-TEMPERATURE

被引：10

作者：

GOITY, JL ^{[1
]}

机构：

[1] HAMPTON UNIV,DEPT PHYS,HAMPTON,VA 23668

来源：

PHYSICS LETTERS B | 1993年 / 319卷 / 04期

关键词：

D O I：

10.1016/0370-2693(93)91741-5

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The relaxation times of particle numbers in hot hadronic matter with vanishing baryon number are estimated using the ideal gas approximation and taking into account resonance decays and annihilation processes as the only sources of particle number fluctuations. Near the QCD critical temperature the longest relaxation times turn out to be of the order of 10 fm and grow roughly exponentially to become of the order of 10(3) fm at temperatures around 1 00 MeV. As a consequence of such long relaxation times, a clear departure from chemical equilibrium must be observed in the momentum distribution of secondary particles produced in high energy nuclear collisions.

引用

页码：401 / 406

页数：6

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