Neutrino radiative-lifetime limits from the absence of solar γ rays

Details Neutrino radiative-lifetime limits from the absence of solar γ rays Neutrino radiative-lifetime limits from the absence of solar γ rays

Jun 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985phrvd..31.3002r&link_type=abstract

Physical Review D (Particles and Fields), Volume 31, Issue 11, 1 June 1985, pp.3002-3004

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19

Solar Electromagnetic Emission

Scientific paper

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.

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