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

Diego Restrepo*

Marco Taoso† and J. W. F. Valle‡

Oscar Zapata§

  • Instituto de Física, Universidad de Antioquia, A.A. 1226, Medellín, Colombia

  • AHEP Group, Institut de Física Corpuscular–C.S.I.C./Universitat de València, Edificio Institutos de Paterna, Apartado 22085, E-46071 Valencia, Spain

  • Escuela de Ingeniería de Antioquia, A.A. 7516, Medellín, Colombia

  • *restrepo@udea.edu.co
  • †taoso@ific.uv.es
  • ‡valle@ific.uv.es
  • §pfozapata@eia.edu.co
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Phys. Rev. D 85, 023523 – Published 23 January, 2012

DOI: https://doi.org/10.1103/PhysRevD.85.023523

Abstract

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 mG˜≲1–10  GeV corresponding to a relatively low reheat temperature TR≲few×107–108  GeV. Neutrino mass and mixing parameters may be reconstructed at accelerator experiments like the Large Hadron Collider.

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Phys. Rev. D 85, 023523– Published 23 January, 2012
  • Received 13 September 2011

© 2012 American Physical Society

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