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Cosmological neutrino mass detection: The best probe of neutrino lifetime

Pasquale D. Serpico
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Abstract

Future cosmological data may be sensitive to the effects of a finite sum of neutrino masses even as small as ~0.06 eV, the lower limit guaranteed by neutrino oscillation experiments. We show that a cosmological detection of neutrino mass at that level would improve by many orders of magnitude the existing limits on neutrino lifetime, and as a consequence on neutrino secret interactions with (quasi-)massless particles as in majoron models. On the other hand, neutrino decay may provide a way-out to explain a discrepancy <~ 0.1 eV between cosmic neutrino bounds and Lab data.

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Pasquale D. Serpico. 2007-04-23. Cosmological neutrino mass detection: The best probe of neutrino lifetime. https://doi.org/10.1103/physrevlett.98.171301

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