CAN A HYPERBOLIC PHASE OF THE BRANS-DICKE FIELD ACCOUNT FOR DARK MATTER?

摘要

We show that the introduction of a hyperbolic phase of the Brans_Dicke (BD) field results in a flat vacuum cosmological solution of the Hubble parameter H and a fractional rate of change of the BD scalar field F, which asymptotically approach constant values. At later stages, the hyperbolic phase of the BD field behaves like dark matter.