Density Perturbations from Modulated Decay of the Curvaton
  We study density perturbations, including their non-Gaussianity, in models in
which the decay rate of the curvaton depends on another light scalar field,
denoted the modulaton. Although this model shares some similarities with the
standard curvaton and modulated reheating scenarios, it exhibits interesting
predictions for f_NL and g_NL that are specific to this model. We also discuss
the possibility that both modulaton and curvaton fluctuations contribute to the
final curvature perturbation. Our results naturally include the standard
curvaton and modulated reheating scenarios as specific limits and are thus
useful to present a unified treatment of these models and their variants.
