Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-02-14
Nucl.Phys. B632 (2002) 189-218; Erratum-ibid. B666 (2003) 305-307
Physics
High Energy Physics
High Energy Physics - Phenomenology
LaTeX2e, 32 pages; errors in computer code corrected, leading to slight changes of the numerical results in the tables and for
Scientific paper
10.1016/S0550-3213(02)00243-2
Recently exact results for the complete fermionic two-loop contributions to the prediction for the W-boson mass from muon decay in the electroweak Standard Model have been published [hep-ph/0007091]. This paper illustrates the techniques that have been applied for this calculation, in particular the renormalisation procedure and the treatment of IR-divergent QED contributions. Numerical results are presented in terms of simple parametrisation formulae and compared in detail with a previous result of an expansion up to next-to-leading order in the top-quark mass. An estimate of the remaining theoretical uncertainties of the MW-prediction from unknown higher-order corrections is given. For the bosonic two-loop corrections a partial result is presented, yielding the Higgs-mass dependence of these contributions.
Freitas Ayres
Hollik Wolfgang
Walter W.
Weiglein Georg
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