Abstract
We study the phenomenology of a keV sterile neutrino in a supersymmetric model with U(1) R -lepton number in the light of a very recent observation of an X-ray line signal at around 3.5 keV, detected in the X-ray spectra of Andromeda galaxy and various galaxy clusters including the Perseus galaxy cluster. This model not only provides a small tree level mass to one of the active neutrinos but also renders a suitable warm dark matter candidate in the form of a sterile neutrino with negligible active-sterile mixing. Light neutrino masses and mixing can be explained once one-loop radiative corrections are taken into account. The scalar sector of this model can accommodate a Higgs boson with a mass of ∼125 GeV. In this model gravitino is the lightest supersymmetric particle (LSP) and we also study the cosmological implications of this light gravitino with mass \( \sim \mathcal{O}\left(\mathrm{GeV}\right) \).
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Chakraborty, S., Ghosh, D.K. & Roy, S. 7 keV sterile neutrino dark matter in U(1) R -lepton number model. J. High Energ. Phys. 2014, 146 (2014). https://doi.org/10.1007/JHEP10(2014)146
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DOI: https://doi.org/10.1007/JHEP10(2014)146