NEUTRINO RADIATIVE LIFETIME LIMITS FROM THE ABSENCE OF SOLAR GAMMA RAYS
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Abstract: (APS)
Observational limits on the solar x- and γ-ray flux restrict the possible conversion of the solar neutrino flux into radiation. This yields a limit on the neutrino radiative lifetime of &≳7×109 sec/eV. We discuss the dependence of this limit on the energy of the decay photon and on neutrino masses and mixing parameters. The original application of this method by Cowsik erroneously yields a more re- strictive result due to a misrepresentation of observational data. The present work closely parallels a recent discussion by Vogel on the decay of reactor neutrinos, the solar limits, however, being almost ten orders of magnitude more restrictive. We stress that solar x-ray measurements are an important tool to set neutrino radiative-lifetime limits, although more restrictive limits from other astrophysical data exist.- COSMIC RADIATION: ELECTROMAGNETIC COMPONENT
- NEUTRINO: COSMIC RADIATION
- FLUX: COSMIC RADIATION
- COSMIC RADIATION: FLUX
- NEUTRINO: LIFETIME
- NEUTRINO: RADIATIVE DECAY
- RADIATIVE DECAY: NEUTRINO
- NEUTRINO: MASS
- MASS: NEUTRINO
- NUMERICAL CALCULATIONS
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