Probing a panoply of curvaton-decay scenarios using CMB data
  In the curvaton scenario, primordial curvature perturbations are produced by
a second field that is sub-dominant during inflation. Depending on how the
curvaton decays [possibly producing baryon number, lepton number, or cold dark
matter (CDM)], mixtures of correlated isocurvature perturbations are produced,
allowing the curvaton scenario to be tested using cosmic microwave background
(CMB) data. Here, a full range of 27 curvaton-decay scenarios is compared with
CMB data, placing limits on the curvaton fraction at decay, $r_D$, and the
lepton asymmetry, $\xi_{\rm lep}$. If baryon number is generated by curvaton
decay and CDM before (or vice-versa), these limits imply specific predictions
for non-Gaussian signatures testable by future CMB experiments and upcoming
large-scale-structure surveys.
