Primordial element production in universes with large lepton-baryon ratio

Details Primordial element production in universes with large lepton-baryon ratio Primordial element production in universes with large lepton-baryon ratio

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.205..683s&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 205, Nov. 1983, p. 683-690.

Astronomy and Astrophysics

Astronomy

28

Baryons, Big Bang Cosmology, Cosmochemistry, Leptons, Particle Production, Universe, Abundance, Astronomical Models, Evolution (Development), Helium Isotopes, Hydrogen Isotopes, Nuclear Fusion, Ratios

Scientific paper

The primordial production of 2H, 3He and 4He as a function of η (the baryon-to-photon ratio) and ξe (the electron-neutrino degeneracy parameter) is discussed. Isoyield curves for these elements in the η, ξe plane are presented. For sufficiently large ξe, the cosmic abundance of elements heavier than magnesium provides a better upper bound on η than does the primordial helium abundance. A limit based on the A ≥ Mg abundances for |ξe| ≤ 1 is presented.

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