Infrared behavior of gluon and ghost propagators in Landau gauge QCD

被引：353

作者：

vonSmekal, L ^{[1
]}

Hauck, A ^{[1
]}

Alkofer, R ^{[1
]}

机构：

[1] UNIV TUBINGEN,INST THEORET PHYS,D-72076 TUBINGEN,GERMANY

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.79.3591

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A truncation scheme for the Dyson-Schwinger equations of Euclidean QCD in Landau gauge is presented. It implements the Slavnov-Taylor identities for the three-gluon and ghost-gluon vertices, whereas irreducible four-gluon couplings as well as the gluon-ghost and ghost-ghost scattering kernels are neglected. The infrared behavior of gluon and ghost propagators is obtained analytically: The gluon propagator vanishes for small momenta, whereas the ghost propagator diverges strongly. The numerical solutions are compared with recent lattice results. The running coupling approaches a fixed point, alpha(c) similar or equal to 9.5, in the infrared. [S0031-9007(97)04470-0].

引用

页码：3591 / 3594

页数：4

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