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arXiv · hep-ph/0001039

Supernova Bounds on Majoron-emitting decays of light neutrinos

M. Kachelriess·R. Tomas·J. W. F. Valle
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Abstract

Neutrino masses arising from the spontaneous violation of ungauged lepton-number are accompanied by a physical Goldstone boson, generically called Majoron. In the high-density supernova medium the effects of Majoron-emitting neutrino decays are important even if they are suppressed in vacuo by small neutrino masses and/or small off-diagonal couplings. We reconsider the influence of these decays on the neutrino signal of supernovae in the light of recent Super-Kamiokande data on solar and atmospheric neutrinos. We find that majoron-neutrino coupling constants in the range $3\times 10^{-7}\lsim g\lsim 2\times 10^{-5}$ or $g \gsim 3 \times 10^{-4}$ are excluded by the observation of SN1987A. Then we discuss the potential of Superkamiokande and the Sudbury Neutrino Observatory to detect majoron neutrino interactions in the case of a future galactic supernova. We find that these experiments could probe majoron neutrino interactions with improved sensitivity.

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M. Kachelriess, R. Tomas, J. W. F. Valle. 2000-01-05. Supernova Bounds on Majoron-emitting decays of light neutrinos. https://doi.org/10.1103/physrevd.62.023004

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