Gaugino radiative decay in an anomalous U(1)' model
High Energy Physics - Phenomenology
2010-02-25 v3 High Energy Physics - Theory
Abstract
We study the neutralino radiative decay into the lightest supersymmetric particle (LSP) in the framework of a minimal anomalous U(1)' extension of the MSSM. It turns out that in a suitable decoupling limit the axino, which is present in the St\"uckelberg multiplet, is the LSP. We compute the branching ratio (BR) for the decay of a neutralino into an axino and a photon. We find that in a wide region of the parameter space, the BR is higher than 93% in contrast with the typical value (<=1%) in the CMSSM.
Cite
@article{arxiv.0905.4607,
title = {Gaugino radiative decay in an anomalous U(1)' model},
author = {Andrea Lionetto and Antonio Racioppi},
journal= {arXiv preprint arXiv:0905.4607},
year = {2010}
}
Comments
18 pages, 7 eps figures, feynmf, revised final version, published on Nucl. Phys. B