Scalar-Tensor Gravity Theory For Dynamical Light Velocity

Details Scalar-Tensor Gravity Theory For Dynamical Light Velocity Scalar-Tensor Gravity Theory For Dynamical Light Velocity

1999-10-31

arxiv.org/abs/gr-qc/9910112v2

Phys.Lett. B477 (2000) 269-275

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

14 pages latex file. Additional material added. Accepted for publication in Physics Letters B

Scientific paper

10.1016/S0370-2693(00)00192-1

A gravity theory is developed with the metric ${\hat g}_{\mu\nu}= {g}_{\mu\nu}+B\partial_\mu\phi\partial_\nu\phi$. In the present universe the additional contribution from the scalar field in the metric ${\hat g}_{\mu\nu}$ can generate an acceleration in the expansion of the universe, without negative pressure and with a zero cosmological constant. In this theory, gravitational waves will propagate at a different speed from non-gravitational waves. It is suggested that gravitational wave experiments could test this observational signature.

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