QCD non-leading corrections to weak decays in the dimensional scheme

Abstract

We compute the next to leading QCD corrections to weak four fermion interactions introducing a scheme that does not require an explicit definition of ${\gamma }_5$ in $d$ dimensions. This scheme reduces greatly the difficulties in calculating the two loop anomalous dimensions; we recover the results obtained in the previous literature.

Comments: 20 pages, latex file, 3 figures (not included)