High temperature QCD with three flavors of improved staggered quarks

被引：20

作者：

Bernard, C ^{[1
]}

Burch, T

DeTar, CE

Gottlieb, S

Gregory, E

Heller, UM

Osborn, J

Sugar, RL

Toussaint, D

机构：

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

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

[3] Florida State Univ, CSIT, Tallahassee, FL 32306 USA

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

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

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

来源：

NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS | 2003年 / 119卷

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0920-5632(03)01603-7

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 present an update of our study of high temperature QCD with three flavors of quarks, using a Symanzik improved gauge action and the Asqtad staggered quark action. Simulations are being carried out on lattices with N-t = 4, 6 and 8 for the, case of three degenerate quarks with masses less than or equal to the strange quark mass, m(s), and on lattices with N-t = 6 and 8 for degenerate up and down quarks with masses in the range 0.2m(s) less than or equal to M-u,M-d less than or equal to 0.6m(s), and the strange quark fixed near its physical value. We also report on first computations of quark number susceptibilities with the Asqtad action. These susceptibilities are of interest because they can be related to event-by-event fluctuations in heavy ion collision experiments. Use of the improved quark action leads to a substantial reduction in lattice artifacts. This can be seen already for free fermions and carries over into our results for QCD.

引用

页码：523 / 528

页数：6

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