Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1843384 | Nuclear Physics B | 2010 | 15 Pages |
Abstract
We study the neutralino radiative decay into the lightest supersymmetric particle (LSP) in the framework of a minimal anomalous U(1)â² extension of the MSSM. It turns out that in a suitable decoupling limit the axino, which is present in the Stückelberg 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 (â²1%) in the CMSSM.
Related Topics
Physical Sciences and Engineering
Mathematics
Mathematical Physics
Authors
Andrea Lionetto, Antonio Racioppi,