1996/06/30 by Doreen Wackeroth, W. Hollik, Wolfgang Hollik · 8 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Electroweak interaction #Fermion #Gauge boson #Gauge theory #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum electrodynamics #Quantum mechanics #Radiative transfer #Resonance (particle physics) #hep-ph
paper · pdf · doi:10.1103/physrevd.55.6788
published as Phys.Rev.D55:6788-6818,1997 · 49 pages, LaTeX source and 17 postscript figures, revised version with few minor changes, accepted for publication in Phys.Rev.D
arxiv created 1997/02/18 · openalex publication_date 1997/06/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The electroweak O(\ensuremathα) contribution to the resonant single W production in a general four-fermion process is discussed with particular emphasis on a gauge-invariant decomposition into a QED-like and weak part. The cross section in the vicinity of the resonance can be represented in terms of a convolution of a ``hard'' Breit-Wigner cross section, comprising the (mt,MH)-dependent weak one-loop corrections, with a universal radiator function. The numerical impact of the various contributions on the W line shape are discussed, together with the concepts of s-dependent and constant width approaches. Analytic formulas for the W decay width are also provided including the one-loop electroweak and QCD corrections.