Loop Effects of Exotic Leptons on Vector-Boson Pair Production at e^+e^- Colliders
High Energy Physics - Phenomenology
2009-10-30 v1
Abstract
We study quantum effects of exotic heavy leptons on the production of two vector bosons in e^+e^- annihilation. We present closed analytic expressions for vector-boson self-couplings and differential cross sections, within the framework of two favourable new-physics scenarios: (i) the fourth-generation Majorana-neutrino model and (ii) an E_6-inspired model with sequential mirror isodoublets. We constrain these models by requiring that their contributions to the oblique electroweak parameters be compatible with a recent global fit to high-precision data. We then systematically analyze the loop-induced deviations in the LEP2 cross section of e^+e^- -> W^+W^- predicted by the models thus confined.
Keywords
Cite
@article{arxiv.hep-ph/9709361,
title = {Loop Effects of Exotic Leptons on Vector-Boson Pair Production at e^+e^- Colliders},
author = {K. -P. O. Diener and B. A. Kniehl and A. Pilaftsis},
journal= {arXiv preprint arXiv:hep-ph/9709361},
year = {2009}
}
Comments
28 pages (Latex), 14 figures (Postscript)