Reheated Universe by unstable neutrinos

Details Reheated Universe by unstable neutrinos Reheated Universe by unstable neutrinos

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988phrvl..61.1046f&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 61, Aug. 29, 1988, p. 1046-1049.

Astronomy and Astrophysics

Astronomy

32

Astronomical Models, Cosmology, Neutrinos, Relic Radiation, Universe, Compton Effect, Intergalactic Media, Particle Energy, Radiative Lifetime

Scientific paper

The possibility is explored that moderately massive neutrinos (1 - 10 keV) with a lifetime shorter than the age of the Universe, decaying predominantly without emitting radiation but with a small branching ratio to the photon channel, have reheated the Universe after recombination. For a reasonable parameter range, it is possible to explain the recently observed spectral distortion of the cosmic microwave background radiation (CBR). Implications are also discussed for the interpretation of the anisotropy measurement of the CBR.

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