Finite Width Effects and Gauge Invariance in Radiative $W$ Production and Decay
High Energy Physics - Phenomenology
2016-09-01 v1
Abstract
The naive implementation of finite width effects in processes involving unstable particles can violate gauge invariance. For the example of radiative production and decay, , at tree level, it is demonstrated how gauge invariance is restored by including the imaginary part of triangle graphs in addition to resumming the imaginary contributions to the vacuum polarization. Monte Carlo results are presented for the Fermilab Tevatron.
Cite
@article{arxiv.hep-ph/9503344,
title = {Finite Width Effects and Gauge Invariance in Radiative $W$ Production and Decay},
author = {U. Baur and D. Zeppenfeld},
journal= {arXiv preprint arXiv:hep-ph/9503344},
year = {2016}
}
Comments
10 pages, Revtex, 3 figures submitted separately as uuencoded tarred postscript files, the complete paper is available at ftp://phenom.physics.wisc.edu/pub/preprints/1995/madph-95-878.ps.Z or http://phenom.physics.wisc.edu/pub/preprints/1995/madph-95-878.ps.Z