Anomalous chiral symmetry breaking above the QCD phase transition

被引：41

作者：

Chandrasekharan, S ^{[1
]}

Chen, D ^{[1
]}

Christ, N ^{[1
]}

Lee, W ^{[1
]}

Mawhinney, R ^{[1
]}

Vranas, P ^{[1
]}

机构：

[1] Columbia Univ, Dept Phys, New York, NY 10027 USA

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.82.2463

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the anomalous breaking of U-A(1) symmetry just above the QCD phase transition for zero and two flavors of quarks, using a staggered fermion, lattice discretization. The properties of the QCD phase transition are expected to depend on the degree of U-A(1) symmetry breaking in the transition region. For the physical case of two flavors, we carry out extensive simulations on a 16(3) x 4 lattice, measuring a difference in susceptibilities which is sensitive to U-A(1) symmetry and which avoids many of the staggered fermion discretization difficulties. The results suggest that anomalous effects are at or below the 15% level.

引用

页码：2463 / 2466

页数：4

共 11 条

[1] CHIRAL SYMMETRY-BREAKING IN CONFINING THEORIES [J].