Radiative Corrections to W and Quark Propagators in the Resonance Region

Preprint

2 July 1998

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.hep-ph/9807218

Abstract

It is shown that conventional mass renormalization, when applied to photonic or gluonic corrections to unstable particle propagators, leads to non-convergent series in the resonance region. A solution of this problem, based on the concepts of pole mass and width, is presented. In contrast with the Z case, the conventional on-shell definition of mass for W bosons and unstable quarks contains an unbounded gauge dependence in next-to-leading order. The on-shell and pole definitions of width are shown to coincide if terms of O(\Gamma^2) and higher are neglected, but not otherwise.

Keywords

RADIATIVE CORRECTIONS
MASS RENORMALIZATION
QUARK PROPAGATORS
CONVENTIONAL MASS
RESONANCE REGION
RENORMALIZATION
PHOTONIC
QUARKS

All Related Versions

Version 1, 1998-07-02, ArXiv
Version 1, 1998-04-17, ArXiv (Unconfirmed version)
Version 2, 1998-11-16, ArXiv (Unconfirmed version)

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