Post-inflationary Scalar Tensor Cosmology and Inflationary Parameters
  Scalar fields provide attractive modifications of pre-BBN cosmology, which
have interesting implications for dark matter abundances. We analyse the effect
of these modifications on the number of e-foldings between horizon exit of CMB
modes and the end of inflation $(N_k)$, and examine the consequences for
inflationary predictions of various models. We find significant effects in the
predictions in the $(n_s, r)$ plane. For a large part of the parameter space,
the shift in $N_k$ is positive; this ameliorates the tension of $m^{2}
\varphi^{2}$ and natural inflation with data.
