Cosmological neutrino mass detection: The best probe of neutrino lifetime
نویسنده
چکیده
Future cosmological data may be sensitive to the effects of a finite neutrino mass even as small as the ∼0.05 eV lower limit guaranteed by neutrino oscillation experiments. We show that a cosmological detection of neutrino mass in agreement with expectations 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 between cosmic neutrino bounds and Lab data.
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