Gravitino dark matter and neutrino masses with bilinear R-parity violation

Details Gravitino dark matter and neutrino masses with bilinear R-parity violation Gravitino dark matter and neutrino masses with bilinear R-parity violation

2011-09-02

arxiv.org/abs/1109.0512v2

Phys. Rev. D 85, 023523 (2012)

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 4 figures, match the published version

Scientific paper

Bilinear R-parity violation provides an attractive origin for neutrino masses and mixings. In such schemes the gravitino is a viable decaying dark matter particle whose R-parity violating decays lead to monochromatic photons with rates accessible to astrophysical observations. We determine the parameter region allowed by gamma-ray line searches, dark matter relic abundance and neutrino oscillation data, obtaining a limit on the gravitino mass $m_{\tilde G} \lsim$ 1-10 GeV corresponding to a relatively low reheat temperature $T_R \lsim$ few $\times 10^7-10^8$ GeV. Neutrino mass and mixing parameters may be reconstructed at accelerator experiments like the Large Hadron Collider.

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