Neutrinos and Big-Bang Nucleosynthesis

Details Neutrinos and Big-Bang Nucleosynthesis Neutrinos and Big-Bang Nucleosynthesis

1998-04-17

arxiv.org/abs/astro-ph/9804170v1

Nucl.Phys. A629 (1998) 538c-544c

Astronomy and Astrophysics

Astrophysics

7 pages, latex, 3 figures. To appear in Nucl. Phys. A629

Scientific paper

10.1016/S0375-9474(97)00734-3

Observations of clusters and super clusters of galaxies have indicated that the Universe is more dominated by baryons than ever estimated in the homogeneous cosmological model for primordial nucleosynthesis. Recent detections of possibly low deuterium abundance in Lyman-$\alpha$ clouds along the line of sight to high red-shift quasars have raised another potential difficulty that \he4 is overproduced in any cosmological models which satisfy the low deuterium abundance constraint. We show that the inhomogeneous cosmological model with degenerate electron-neutrino can resolve these two difficulties.

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