Observational consequences of evolution of primordial fluctuations in scalar - tensor cosmology

  title={Observational consequences of evolution of primordial fluctuations in scalar - tensor cosmology},
  author={Ryo Nagata and Takeshi Chiba and Naoshi Sugiyama},
  journal={Physical Review D},
The evolution of primordial fluctuations in a Brans-Dicke type scalar-tensor gravity theory is comprehensively investigated. The harmonic attractor model, in which the scalar field has its harmonic effective potential in the Einstein conformal frame and the theory relaxes toward Einstein gravity with time, is considered. The evolution of adiabatic initial perturbations in flat SCDM models is examined from the radiation-dominated epoch up to the present. We discuss how the scalar-tensor gravity… 

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