de Sitter symmetries and inflationary correlators in parity violating
  scalar-vector models
  In this paper we use conformal field theory techniques to constrain the form
of the correlations functions of an inflationary scalar-vector model described
by the interaction term $f_1(\phi)F_{\mu \nu}F^{\mu \nu} +
f_2(\phi)\tilde{F}_{\mu \nu}F^{\mu \nu}$. We use the fact that the conformal
group is the relevant symmetry group acting on super horizon scales in an
inflationary de Sitter background. As a result, we find that super horizon
conformal symmetry, constraints the form of the coupling functions $f_1, f_2$
to be homogeneous functions of the same degree. We derive the general form of
the correlators involving scalar and vector perturbations in this model and
determine its squeezed limit scaling behaviour for super horizon scales. The
approach followed here is useful to constraint the shape of scalar-vector
correlators, and our results agree with recent literature on the subject, but
don't allow us to determine amplitude factors of the correlators.
