Constraints on unstable heavy neutrinos from cosmology |
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| Authors: | M M Vasanthi T Padmanabhan |
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| Institution: | (1) Tata Institute of Fundamental Research, Homi Bhabha Road, 400005 Bombay |
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| Abstract: | Cosmological scenarios with massive unstable neutrinos are discussed. Restrictions on the mass and the lifetime of the unstable
neutrino are derived from (a) age and mass density of the universe and (b) the growth of primordial fluctuations. It will
not be possible to accommodate unstable neutrinos with masses above ∼ 1 ke V in standard cosmology unless they have exceedingly
small lifetime: Τ <5 × 108 s. |
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| Keywords: | neutrino unstable cosmology |
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