Trilinear gauge boson couplings in the standard model with one universal extra dimension
Abstract
One-loop effects of Standard Model (SM) extensions comprising universal extra dimensions are essential as a consequence of Kaluza-Klein (KK) parity conservation, for they represent the very first presumable virtual effects on low-energy observables. In this paper, we calculate the one-loop CP-even contributions to the SM WWgamma and WWZ gauge couplings produced by the KK excited modes that stand for the dynamical variables of the effective theory emerged from a generalization of the SM to five dimensions, in which the extra dimension is assumed to be universal, after compactification. The employment of a covariant gauge-fixing procedure that removes gauge invariance associated to gauge KK excited modes, while keeping electroweak gauge symmetry manifest, is a main feature of this calculation, which is performed in the Feynman 't Hooft gauge and yields finite results that consistently decouple for a large compactification scale. After numerical evaluation, our results show to be comparable with the one-loop SM contributions and well within the reach of a next linear collider.
Keywords
Cite
@article{arxiv.1305.0621,
title = {Trilinear gauge boson couplings in the standard model with one universal extra dimension},
author = {M. A. López-Osorio and E. Martínez-Pascual and J. Montano and H. Novales-Sánchez and J. J. Toscano and E. S. Tututi},
journal= {arXiv preprint arXiv:1305.0621},
year = {2013}
}
Comments
25 pages, 6 figures, new references added, typos corrected