QCD equation of state with 2+1 flavors of improved staggered quarks

被引：86

作者：

Bernard, C. ^{[1
]}

Burch, T.

DeTar, C.

Gottlieb, Steven

Levkova, L.

Heller, U. M.

Hetrick, J. E.

Sugar, R.

Toussaint, D.

机构：

[1] Washington Univ, Dept Phys, St Louis, MO 63130 USA

[2] Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany

[3] Univ Utah, Dept Phys, Salt Lake City, UT 84112 USA

[4] Indiana Univ, Dept Phys, Bloomington, IN 47405 USA

[5] Indiana Univ, Dept Phys, Bloomington, IN 47405 USA

[6] Amer Phys Soc, Ridge, NY 11961 USA

[7] Univ Pacific, Dept Phys, Stockton, CA 95211 USA

[8] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

[9] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA

来源：

PHYSICAL REVIEW D | 2007年 / 75卷 / 09期

关键词：

D O I：

10.1103/PhysRevD.75.094505

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report results for the interaction measure, pressure, and energy density for nonzero-temperature QCD with 2+1 flavors of improved staggered quarks. In our simulations, we use a Symanzik improved gauge action and the Asqtad O(a(2)) improved staggered quark action for lattices with temporal extent N-t=4 and 6. The heavy quark mass m(s) is fixed at approximately the physical strange quark mass and the two degenerate light quarks have masses m(ud)approximate to 0.1m(s) or 0.2m(s). The calculation of the thermodynamic observables employs the integral method where energy density and pressure are obtained by integration over the interaction measure.

引用

页数：12

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