Gravitational decay of the Z-boson
High Energy Physics - Phenomenology
2009-11-11 v2
Abstract
We study the decay process of the Z boson to a photon and a graviton. The most general form of the on-shell amplitude, subject to the constraints due to the conservation of the electromagnetic and the energy-momentum tensor, is determined. The amplitude is expressed in terms of three form factors, two of which are CP-odd while one is CP-even. The latter, which is the only non-zero form factor at the one-loop level, is computed in the standard model and the decay rate is determined.
Cite
@article{arxiv.hep-ph/0509321,
title = {Gravitational decay of the Z-boson},
author = {Jose F. Nieves and Palash B. Pal},
journal= {arXiv preprint arXiv:hep-ph/0509321},
year = {2009}
}
Comments
30 pages, Latex, uses Axodraw. (Some typographical errors corrected, and some references added in the new version.)