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arXiv · 1102.5124

Supernova bound on keV-mass sterile neutrinos reexamined

Georg G. Raffelt·Shun Zhou
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Abstract

Active-sterile neutrino mixing is strongly constrained for m_s > 100 keV to avoid excessive energy losses from supernova cores. For smaller m_s, matter effects suppress the effective mixing angle except for a resonant range of energies where it is enhanced. We study the case of \nu_tau-\nu_s-mixing where a \nu_tau-\bar\nu_tau asymmetry builds up due to the strong excess of \nu_s over \bar\nu_s emission or vice versa, reducing the overall emission rate. In the warm dark matter range m_s < 10 keV the mixing angle is essentially unconstrained.

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Georg G. Raffelt, Shun Zhou. 2011-02-24. Supernova bound on keV-mass sterile neutrinos reexamined. https://doi.org/10.1103/physrevd.83.093014

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