Cold dark matter isocurvature perturbation in the curvaton scenario
Cold dark matter isocurvature perturbation in the curvaton scenario
We discuss the residual isocurvature perturbations, fully correlated with the curvature perturbation, that are automatic in the curvaton scenario if curvaton decay is sufficiently late. We contrast these residual isocurvature perturbations with the generally uncorrelated ``intrinsic'' isocurvature perturbation generated by an additional field such as the axion. We present a …