Zero of the discrete beta function in SU(3) lattice gauge theory with color sextet fermions

被引：126

作者：

Shamir, Yigal ^{[1
]}

Svetitsky, Benjamin ^{[1
]}

机构：

[1] Tel Aviv Univ, Raymond & Beverly Sackler Sch Phys & Astron, IL-69978 Tel Aviv, Israel

来源：

PHYSICAL REVIEW D | 2008年 / 78卷 / 03期

基金：

以色列科学基金会;

关键词：

D O I：

10.1103/PhysRevD.78.031502

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have carried out a Schrodinger functional calculation for the SU(3) lattice gauge theory with two flavors of Wilson fermions in the sextet representation of the gauge group. We find that the discrete beta function, which governs the change in the running coupling under a discrete change of spatial scale, changes sign when the Schrodinger functional renormalized coupling is in the neighborhood of g(2)=2.0. The simplest explanation is that the theory has an infrared-attractive fixed point, but more complicated possibilities are allowed by the data. While we compare rescalings by factors of 2 and 4/3, we work at a single lattice spacing.

引用

页数：5

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