CHEMICAL-EQUILIBRIUM IN QCD GAS IN THE EARLY UNIVERSE

被引：33

作者：

ENQVIST, K ^{[1
]}

SIRKKA, J ^{[1
]}

机构：

[1] UNIV TURKU,DEPT PHYS,SF-20500 TURKU 50,FINLAND

来源：

PHYSICS LETTERS B | 1993年 / 314卷 / 3-4期

关键词：

D O I：

10.1016/0370-2693(93)91239-J

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We compute the thermally averaged qqBAR-annihilation rate into two and three gluons in the early universe. We show that at very high temperatures qqBAR --> ggg represents only a 3% correction to qqBAR --> gg. Comparing the annihilation rate to the Hubble rate, corrected for particle interactions in the Standard Model gas, we find that quarks and gluons are not in chemical equilibrium when T greater than or similar to 3 x 10(14) GeV.

引用

页码：298 / 302

页数：5

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