Infrared behavior of gluon and ghost propagators in Landau gauge QCD

被引：351
|
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
收藏
页码：3591 / 3594
页数：4
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