Gluon and ghost propagators in linear covariant gauges

被引：59

作者：

Huber, Markus Q. ^{[1
]}

机构：

[1] Graz Univ, Inst Phys, NAWI Graz, A-8010 Graz, Austria

来源：

PHYSICAL REVIEW D | 2015年 / 91卷 / 08期

基金：

奥地利科学基金会;

关键词：

DYSON-SCHWINGER EQUATIONS; YANG-MILLS THEORIES; LANDAU GAUGE; INFRARED BEHAVIOR; QCD; RENORMALIZATION; CONFINEMENT; EXPONENTS; VERTEX;

D O I：

10.1103/PhysRevD.91.085018

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We compute the gluon and ghost propagators of Yang-Mills theory in linear covariant gauges from the coupled system of Dyson-Schwinger equations. For small values of the gauge fixing parameter xi similar to 0.1, the deviations to the Landau gauge already become clearly visible. For the ghost dressing function, this is reflected in a logarithmic infrared suppression. Also, the gluon dressing function changes-but only quantitatively-and the gluon propagator remains finite at zero momentum. From the results, a running coupling is extracted.

引用

页数：9

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