Quark-gluon vertex in a momentum subtraction scheme

被引：18
|
作者：
Skullerud, J
Kizilersü, AE
Williams, AG
机构：
[1] DESY, Div Theory, D-22603 Hamburg, Germany
[2] Univ Adelaide, Ctr Subatom Struct Matter, Adelaide, SA 5005, Australia
来源：
NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS | 2002年 / 106卷
基金：
澳大利亚研究理事会;
关键词：
D O I：
10.1016/S0920-5632(01)01861-8
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
We compute the quark-gluon vertex in quenched QCD, in the Landau gauge using an off-shell mean-field O(a)-improved fermion action. The running coupling is calculated in an 'asymmetric' momentum subtraction scheme (MOM). We obtain a crude estimate for Lambda((MS) over bar) = 170 +/- 65 MeV, which is considerably lower than other determinations of this quantity. However, substantial systematic errors remain.
引用
收藏
页码：841 / 843
页数：3
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