Gaugino radiative decay in an anomalous U(1)' model

Details Gaugino radiative decay in an anomalous U(1)' model Gaugino radiative decay in an anomalous U(1)' model

2009-05-28

arxiv.org/abs/0905.4607v3

Nucl.Phys.B831:329-343,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 7 eps figures, feynmf, revised final version, published on Nucl. Phys. B

Scientific paper

10.1016/j.nuclphysb.2010.01.023

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.

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