Gravitational violation of R parity and its cosmological signatures

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1998
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The discrete R-parity (RP) usually imposed on the Supersymmetric (SUSY) models is expected to be broken at least gravitationally. If the neutralino is a dark matter particle its decay channels into positrons, antiprotons and neutrinos are severely constrained from astrophysical observations. These constraints are shown to be violated even for Planck-mass-suppressed dimension-five interactions arising from gravitational effects. We perform a general analysis of gravitationally induced RP violation and identify two plausible and astrophysically consistent scenarios for achieving the required suppression.
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Berezinsky, Veniamin Joshipura, Anjan S. Furtado Valle, José Wagner 1998 Gravitational violation of R parity and its cosmological signatures Physical Review D 57 1 147 151
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