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arXiv · 0903.1813

R-parity Violating Right-Handed Neutrino in Gravitino Dark Matter Scenario

Motoi Endo·Tetsuo Shindou
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Abstract

A decay of the gravitino dark matter is an attractive candidate to explain the current excesses of the PAMELA/ATIC cosmic-ray data. However, R-parity violations are required to be very tiny in low-energy scale. We suggest a R-parity violation in the right-handed neutrino sector. The violation is suppressed by a see-saw mechanism. Although a reheating temperature is constrained from above, the thermal leptogenesis is found to work successfully with a help of the R-parity violating right-handed neutrino.

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Motoi Endo, Tetsuo Shindou. 2009-03-10. R-parity Violating Right-Handed Neutrino in Gravitino Dark Matter Scenario. https://doi.org/10.1088/1126-6708/2009/09/037

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