Prog. Theor. Phys. Vol. 72 No. 6 (1984) pp. 1262-1265

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Letters

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

Department of Astronomy, Faculty of Science, University of Tokyo, Tokyo 113.
^*Department of Physics, Faculty of Science, University of Tokyo, Tokyo 113

(Received August 20, 1984)

Abstract:

Primordial nucleosynthesis in a “cold” universe is investigated for wide ranges of both the initial baryon / photon ratio, 3×10^-6≤η_i ≤15, and lepton/ baryon ratio, 1≤Le/B≤10⁵. Constraints on these parameters are obtained from the abundance of heavy elements. Most importantly, cold universe models with a baryon / photon ratio η_i > 10^-4 can be ruled out.

URL : http://ptp.ipap.jp/link?PTP/72/1262/
DOI : 10.1143/PTP.72.1262

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Citing Article(s) :

Progress of Theoretical Physics Vol. 80 No. 3 (1988) pp. 468-476 :
Lepton and Baryon Number Asymmetry of the Universe and Primordial Nucleosynthesis

Nobuo Terasawa and Katsuhiko Sato
Progress of Theoretical Physics Vol. 81 No. 2 (1989) pp. 254-259 :
Neutron Diffusion and Nucleosynthesis in the Inhomogeneous Universe

Nobuo Terasawa and Katsuhiko Sato
Progress of Theoretical Physics Vol. 81 No. 6 (1989) pp. 1085-1090 :
Nucleosynthesis in the Inhomogeneous Universe and Effects of Neutron Diffusion

Nobuo Terasawa and Katsuhiko Sato