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Constraints from primordial nucleosynthesis on the mass of the tau neutrinoIt is shown that primordial nucleosynthesis excludes a tau-neutrino mass from 0.3 to 25 MeV (Dirac) and 0.5 to 25 MeV (Majorana) provided that its lifetime is not less than about 1 sec, and from 0.3 to 30 MeV (Dirac) and 0.5 to 32 MeV (Majorana) for a lifetime of not less than about 1000 sec. A modest improvement in the laboratory mass limit - from 35 to 25 MeV - would imply that the tau-neutrino mass must be less than 0.5 MeV (provided the lifetime is not less than about 1 sec).
Document ID
19910061920
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Kolb, Edward W.
(NASA Lewis Research Center Cleveland, OH, United States)
Turner, Michael S.
(NASA Lewis Research Center Cleveland, OH, United States)
Chakravorty, A.
(NASA Lewis Research Center Cleveland, OH, United States)
Schramm, David N.
(NASAFermilab Astrophysics Center Batavia; Chicago, University, IL, United States)
Date Acquired
August 14, 2013
Publication Date
July 29, 1991
Publication Information
Publication: Physical Review Letters
Volume: 67
ISSN: 0031-9007
Subject Category
Astrophysics
Accession Number
91A46543
Funding Number(s)
CONTRACT_GRANT: NAGW-1340
CONTRACT_GRANT: NAGW-1321
Distribution Limits
Public
Copyright
Other

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