Calculation of fermionic two-loop contributions to muon decay

Preprint

13 July 2000

preprint
Published by arXiv in arXiv

Abstract

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.

Keywords

LOOP CONTRIBUTIONS
RENORMALIZATION
STANDARD MODEL
FERMIONIC TWO
MUON DECAY
TWO LOOP
DELTA

All Related Versions

Version 1, 2000-07-13, ArXiv
Version 2, 2000-08-11, ArXiv
Published version: Nuclear Physics B - Proceedings Supplements, 89 (1-3), 82.

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