Limits from cosmological nucleosynthesis on the leptonic numbers of the universe

Details Limits from cosmological nucleosynthesis on the leptonic numbers of the universe Limits from cosmological nucleosynthesis on the leptonic numbers of the universe

Jan 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...241..343b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 241, no. 2, Jan. 1991, p. 343-357.

Statistics

Computation

6

Leptons, Nuclear Astrophysics, Nuclear Fusion, Universe, Computational Astrophysics, Deuterium, Helium, Interstellar Chemistry, Neutrinos

Scientific paper

Constraints on chemical potentials and masses of 'inos' are calculated using cosmological standard nucleosynthesis processes. It is shown that the electron neutrino chemical potential (ENCP) should not be greater than a value of the order of 1, and that the possible effective chemical potential of the other neutrino species should be about 10 times the ENCP in order not to conflict with observational data. The allowed region (consistent with the He-4 abundance observations) is insensitive to the baryon to proton ratio eta, while those imposed by other light elements strongly depend on eta.

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