Final-state radiation and line-shape distortion in resonance pair production
High Energy Physics - Phenomenology
2009-10-31 v1
Abstract
In this letter it is shown how final-state QED corrections to the production of a pair of resonances can distort the line shape of such a resonance in a sizeable way. This effect depends on the definition of the line shape and can reach up to 30%, depending on the final state. The mechanism is first displayed for a particular case of ZZ production, for which an exact and approximate treatment can be given. The approximate method is then applied to W-pair production. In addition some simple rules of thumb are given for accurately estimating the characteristic distortion effects, like the mass shift and peak reduction.
Keywords
Cite
@article{arxiv.hep-ph/9805327,
title = {Final-state radiation and line-shape distortion in resonance pair production},
author = {W. Beenakker and F. A. Berends and A. P. Chapovsky},
journal= {arXiv preprint arXiv:hep-ph/9805327},
year = {2009}
}
Comments
9 pages, LaTeX2e, 1 figure