A Model With Dynamical R-parity Breaking and Unstable Gravitino Dark Matter

Abstract

An unstable gravitino with lifetime longer than $10^{26}$ 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 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 LSP long lived enough, so that it becomes the dark matter of the Universe. It also allows detectable displaced vertices at the LHC from NLSP decays. We present a detailed analysis of the model and some aspects of its rich phenomenology.

24 pages, 9 figures and 1 table, typos corrected

References in corpus (8)

• Big-Bang Nucleosynthesis and Gravitino
• Gamma Ray Spectrum from Gravitino Dark Matter Decay
• High Energy Cosmic Rays from the Decay of Gravitino Dark Matter
• Gamma-Rays from Decaying Dark Matter
• Minimal Supersymmetric Left-Right Model with Automatic R Parity
• Probing bilinear R-parity violating supergravity at the LHC
• SO(10) SUSY GUTs, the gravitino problem, non-thermal leptogenesis and axino dark matter
• Signals of Doubly-Charged Higgsinos at the CERN Large Hadron Collider

Cited by in corpus (13)

• Neutrino Non-Standard Interactions: A Status Report
• The Hunt for New Physics at the Large Hadron Collider
• Indirect Searches for Decaying Dark Matter
• R-Parity Breaking via Type II Seesaw, Decaying Gravitino Dark Matter and PAMELA Positron Excess
• Probing Gravitino Dark Matter with PAMELA and Fermi
• Naturally Light Sterile Neutrinos from Theory of R-parity
• Minimal Decaying Dark Matter and the LHC
• Superparticle Mass Window from Leptogenesis and Decaying Gravitino Dark Matter
• Unstable Gravitino Dark Matter - Prospects for Indirect and Direct Detection
• Long-Lived stop at the LHC with or without R-parity
• Dark matter and neutrino masses in the R-parity violating NMSSM
• LHC phenomenology of supersymmetric models beyond the MSSM
• Some Aspects of New CDM Models and CDM Detection Methods