  We have studied transitions between vector and pseudoscalar mesons using the
HISQ action for the valence quarks. We have calculated all of the axial and
vector form factors that appear in the decay rate for $D_s \to \phi \ell \nu$
over the full $q^2$ range and compared them to the shape of the experimental
decay distributions. We use nonperturbatively normalised currents for the
vector and axial vector currents. The same set up for the three point
correlations functions also allow us to study radiative decays and we have
calculated the decay rate for $J/\psi \to \eta_c \gamma$.
