Supernova bound on keV-mass sterile neutrinos reexamined
High Energy Physics - Phenomenology
2011-06-07 v2 Solar and Stellar Astrophysics
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.
Keywords
Cite
@article{arxiv.1102.5124,
title = {Supernova bound on keV-mass sterile neutrinos reexamined},
author = {Georg G. Raffelt and Shun Zhou},
journal= {arXiv preprint arXiv:1102.5124},
year = {2011}
}
Comments
6 pages, 4 figures; minor changes, references updated, matches the published version