Constraints on Baryon and Lepton Number Asymmetries of the Early Universe from Primordial Nucleosynthesis

Details Constraints on Baryon and Lepton Number Asymmetries of the Early Universe from Primordial Nucleosynthesis Constraints on Baryon and Lepton Number Asymmetries of the Early Universe from Primordial Nucleosynthesis

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984pthph..72.1262t&link_type=abstract

Progress of Theoretical Physics, Vol. 72, No. 6, pp. 1262-1265

Physics

9

Scientific paper

Primordial nucleosynthesis in a ``cold'' universe is investigated for wide ranges of both the initial baryon / photon ratio, 3x 10(-6) <= eta _i <= 15, and lepton/ baryon ratio, 1<= Le/B<= 10(5) . Constraints on these parameters are obtained from the abundance of heavy elements. Most importantly, cold universe models with a baryon / photon ratio eta_i > 10(-4) can be ruled out.

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