NSPT on the twisted Eguchi-Kawai model yields gradient flow coupling coefficients whose flow-time dependence reproduces the universal one-loop beta function and, with large errors, a two-loop value.
Two-loop relation between the bare lattice coupling and the MSbar coupling in pure SU(N) gauge theories
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We report the result of a computation of the relation between the renormalized coupling in the MSbar scheme of dimensional regularization and the bare coupling in the standard lattice formulation of the SU(N) Yang-Mills theory to two-loop order of perturbation theory and discuss some of its implications.
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The perturbative computation of the gradient flow coupling for the twisted Eguchi-Kawai model with the numerical stochastic perturbation theory
NSPT on the twisted Eguchi-Kawai model yields gradient flow coupling coefficients whose flow-time dependence reproduces the universal one-loop beta function and, with large errors, a two-loop value.