Three-Loop Results in QCD with Wilson Fermions
B. Alles, C. Christou, A. Feo, H. Panagopoulos, E. Vicari
Abstract
We calculate the third coefficient of the lattice beta function in QCD with Wilson fermions, extending the pure gauge results of Luescher and Weisz; we show how this coefficient modifies the scaling function on the lattice. We also calculate the three-loop average plaquette in the presence of Wilson fermions. This allows us to compute the lattice scaling function both in the standard and energy schemes.
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