%0 Journal Article
%T Calculation of fermionic two-loop contributions to muon decay
%A A. Freitas
%A S. Heinemeyer
%A W. Hollik
%A W. Walter
%A G. Weiglein
%J Physics
%D 2000
%I arXiv
%R 10.1016/S0920-5632(00)00827-6
%X The computation of the correction \Delta r in the W-Z mass correlation, derived from muon decay, is described at the two-loop level in the Standard Model. Technical aspects which become relevant at this level are studied, e.g. gauge-parameter independent mass renormalization, ghost-sector renormalization and the treatment of \gamma_5. Exact results for \Delta r and the W mass prediction including O(\alpha^2) corrections with fermion loops are presented and compared with previous results of a next-to-leading order expansion in the top-quark mass.
%U http://arxiv.org/abs/hep-ph/0007129v2