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Radiative gravitino decays from R-parity violation | | S. Lola
; P. Osland
; A.R. Raklev
; | | Date: |
17 Jul 2007 | | Abstract: | We study radiative gravitino decay within the framework of R-violating
supersymmetry. For trilinear R-violating couplings that involve the third
generation of fermions, or for light gravitinos, we find that the radiative
loop-decay $ ilde{G} o gamma
u$ dominates over the tree-level ones for a
wide set of parameters. We calculate the gravitino decay width and study its
implications for cosmology and collider physics. Slow-decaying gravitinos are
good dark matter candidates, for a range of parameters that would also predict
observable R-violating signatures in colliders. In general the branching ratios
are very dependent on the relative hierarchies of R-violating operators, and
may provide relevant information on the flavour structure of the underlying
fundamental theory. | | Source: | arXiv, arxiv.0707.2510 | | Services: | Forum | Review | PDF | Favorites | |
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