Updating nucleosynthesis bounds on Jordan-Brans-Dicke theories of gravity

Details Updating nucleosynthesis bounds on Jordan-Brans-Dicke theories of gravity Updating nucleosynthesis bounds on Jordan-Brans-Dicke theories of gravity

Mar 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992phlb..278...94c&link_type=abstract

Physics Letters B, Volume 278, Issue 1-2, p. 94-96.

Physics

45

Scientific paper

Nucleosynthesis bounds on Jordan-Brans-Dicke theories of gravity are updated using improved determinations of 4He, D + 3He and 7Li primordial abundances and neutron life-time. We find, for Nv = 3 and most of the allowed Ω0h02 range, stronger bounds than those obtained from post-newtonian experiments, ∥ω∥ > 250 (2σ). In particular at 2σ level, ω > 380 (440) for Ω0h02 = 0.25 (1). Furthermore, it is suggested that GR predictions with Nv = 3 are hardly consistent with nucleosynthesis observations at 90% CL, while GR with Nv = 2 seems to accommodate better the observations.

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