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Quark-gluon vertex in a momentum subtraction scheme

Authors
Publisher
Elsevier B.V.
Publication Date
Identifiers
DOI: 10.1016/s0920-5632(01)01861-8
Keywords
  • Parallel Sessions
Disciplines
  • Physics

Abstract

Abstract 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 Λ MS = 170 ± 65 MeV, which is considerably lower than other determinations of this quantity. However, substantial systematic errors remain.

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