Nucleosynthesis with nonzero lepton numbers: Is there a limit on the neutrino flavors?

Research output: Contribution to journalArticlepeer-review

Abstract

The data concerning the cosmological abundances of 4He and 2H and the uncertainties of the neutron lifetime seem to be incompatible by a narrow margin with the existence of three neutrino flavors. The possibilities of resolving this apparent contradiction are discussed. A discovery of a fourth light neutrino would indicate the lepton asymmetry of the universe at the time of nucleosynthesis. Even in the case of neutrino degeneracy the number of neutrino species is constrained by the baryon density.

Original languageEnglish (US)
Pages (from-to)453-456
Number of pages4
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume101
Issue number6
DOIs
StatePublished - May 28 1981
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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