Avoiding the Landau-pole in perturbative QCD

Abstract

We propose an alternative perturbative expansion for QCD. All scheme and scale dependence is reduced to one free parameter. Fixing this parameter with a fastest apparent convergence criterion gives sensible results in the whole energy region. We apply the expansion to the calculation of the zero flavor triple gluon vertex, the quark gluon vertex, the gluon propagator and the ghost propagator. A qualitative agreement with the corresponding lattice results is found.

18 pages, 8 figures

References in corpus (3)

• Infinite Volume and Continuum Limits of the Landau-Gauge Gluon Propagator
• Quark-gluon vertex in a momentum subtraction scheme
• SU(2) Running Coupling Constant and Confinement in Minimal Coulomb and Landau Gauges

Cited by in corpus (5)

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• Infrared Features of the Landau Gauge QCD
• What the Gribov copy tells on the confinment and the theory of dynamical chiral symmetry breaking
• Pseudoscalar qqbar mesons and effective QCD coupling enhanced by <A^2> condensate
• Computation of the one-loop spectral QCD running coupling using covariant spectral regularization