Radiative decay lifetime of neutrinos and the evolution of the universe after the recombination era

Details Radiative decay lifetime of neutrinos and the evolution of the universe after the recombination era Radiative decay lifetime of neutrinos and the evolution of the universe after the recombination era

Oct 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981phlb..106...73r&link_type=abstract

Physics Letters B, Volume 106, Issue 1-2, p. 73-76.

Physics

26

Scientific paper

If the radiative decay lifetime τ of massive neutrinos is less than 1025 s, but exceeding present constraints, the epoch of neutral hydrogen in the history of the universe could have been short or altogether absent. Erasure of small scale fluctuations in the cosmic microwave background radiation and other consequences of such lifetimes are discussed. From observations of neutral hydrogen in the nearby galaxy M 31 a lower limit τ >= 1024 s is obtained (for neutrino masses in the range 30 eV <= m <= 150 eV).
Permanent address: Department of Atomic Physics, R. Eotvos University, 1088 Budapest, Hungary.

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