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Constraints from Primordial Nucleosynthesis on Neutrino Degeneracy

  • Ho-Shik Kang
Conference paper
Part of the Astrophysics and Space Science Library book series (ASSL, volume 169)

Abstract

We present the permissible ranges of, and most stringent constraints on, the lepton asymmetry(degeneracy), particulary the electron-neutrino asymmetry, for different baryon asymmetries by comparing calculated primordial abundances of the light elements(D, 3 He, 4 He, 7 Li) in Big Bang Nucleosynthesis(BBN) with those abundances inferred from current observational data. Furthermore, we show that the Universe can be closed by baryons only (Ωb = 1) if neutrinos are sufficiently degenerate. Finally, we study the behaviour of the abundances of the light elements for different baryon and lepton asymmetries.

Keywords

Light Element Light Neutrino Baryon Asymmetry Stringent Constraint Allowed Region 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. 1.
    Kang, H.-S. and Steigman, G. (1990), to be submitted to Nucl. Phys. B, Dec. 1990.Google Scholar
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    David, Y. and Reeves, H., (1980), Phil. Trans. Roy. Soc., A296, 415.ADSGoogle Scholar
  3. 3.
    Steigman, G., (1979), Ann. Rev. Nucl. Part. Sci., 29, 313.ADSCrossRefGoogle Scholar
  4. 4.
    Steigman, G., (1985), Nucleosynthesis and Its Implications on Nuclear and Particle Physics, in J. Audouze and N. Mathieu (eds.), NATO ASI Series, vol. 163, p. 45.Google Scholar

Copyright information

© Springer Science+Business Media Dordrecht 1991

Authors and Affiliations

  • Ho-Shik Kang
    • 1
  1. 1.Department of PhysicsThe Ohio State UniversityColumbusUSA

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