Big Bang Nucleosynthesis and Tensor-Scalar Gravity

Details Big Bang Nucleosynthesis and Tensor-Scalar Gravity Big Bang Nucleosynthesis and Tensor-Scalar Gravity

Jul 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998stin...9928838d&link_type=abstract

Technical Report, PB99-122319; IHES/P/98/54

Mathematics

Logic

Big Bang Cosmology, Tensor Analysis, Nuclear Fusion, Gravitation, Gravitational Fields, Baryons, Relativity

Scientific paper

Big Bang Nucleosynthesis (BNN) is studied within the framework of a two-parameter family of tensor-scalar theories of gravitation. The authors run a BBN code modified by tensor-scalar gravity, and impose that the theoretically predicted BBN yields of Deuterium, Helium and Lithium lie within some conservative observational ranges. It is found that large initial values of atheta (corresponding to initial cosmological expansion rates much larger than the standard) are compatible with observed BBN yields. However, BBN-inferred upper bound on the cosmological baryon density is insignificantly modified by considering tensor-scalar gravity.

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