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

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.

13 pages, 1 figure

References in corpus (9)

• Observation of an anomalous positron abundance in the cosmic radiation
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Data Processing, Sky Maps, and Basic Results
• Leptogenesis
• Thermal production of gravitinos
• Constraints on the Reheating Temperature in Gravitino Dark Matter Scenarios
• Inflaton Decay in Supergravity
• Gamma Ray Spectrum from Gravitino Dark Matter Decay
• High Energy Cosmic Rays from the Decay of Gravitino Dark Matter
• Antimatter Signatures of Gravitino Dark Matter Decay

Cited by in corpus (4)

• T(13) Flavor Symmetry and Decaying Dark Matter
• Universally Leptophilic Dark Matter From Non-Abelian Discrete Symmetry
• Axino dark matter with R-parity violation and 130 GeV gamma-ray line
• Long-Lived stop at the LHC with or without R-parity