Two-loop hard-thermal-loop thermodynamics with quarks

被引：57
|
作者：
Andersen, JO
Petitgirard, E
Strickland, M
机构：
[1] Univ Utrecht, Inst Theoret Phys, NL-3584 CE Utrecht, Netherlands
[2] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA
[3] Vienna Univ Technol, Inst Theoret Phys, A-1040 Vienna, Austria
[4] Duke Univ, Dept Phys, Durham, NC 27701 USA
来源：
PHYSICAL REVIEW D | 2004年 / 70卷 / 04期
关键词：
D O I：
10.1103/PhysRevD.70.045001
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We calculate the quark contribution to the free energy of a hot quark-gluon plasma to two-loop order using hard-thermal-loop (HTL) perturbation theory. All ultraviolet divergences can be absorbed into renormalizations of the vacuum energy and the HTL quark and gluon mass parameters. The quark and gluon HTL mass parameters are determined self-consistently by a variational prescription. Combining the quark contribution with the two-loop HTL perturbation theory free energy for pure glue we obtain the total two-loop QCD free energy. Comparisons are made with lattice estimates of the free energy for N-f=2 and with exact numerical results obtained in the large-N-f limit.
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页数：43
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