Model with dynamical R-parity breaking and unstable gravitino dark matter
- Maryland Center for Fundamental Physics and Department of Physics, University of Maryland, College Park, Maryland 20742 (United States)
An unstable gravitino with lifetime longer than 10{sup 26} sec or so has been proposed as a possible dark matter candidate in supergravity models with R-parity breaking. We find a natural realization of this idea in the minimal supersymmetric left-right models, where left-right symmetry-breaking scale is in the few TeV range. It is known that in these models, R-parity must break in order to have parity breaking as required by low energy weak interactions. The sub-eV neutrino masses imply that R-parity breaking effects in this model must be highly suppressed. This in turn makes the gravitino lightest supersymmetric particle long-lived enough, so that it becomes the dark matter of the Universe. It also allows detectable displaced vertices at the LHC from next-to-lightest supersymmetry particle decays. We present a detailed analysis of the model and some aspects of its rich phenomenology.
- OSTI ID:
- 21254345
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 78, Issue 7; Other Information: DOI: 10.1103/PhysRevD.78.075032; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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