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We discuss non-Gaussianity and baryonic isocurvature fluctuations in thecurvaton scenario, assuming that the baryon asymmetry of the universeoriginates only from the decay products of the inflaton. When largenon-Gaussianity is realized in such a scenario, non-vanishing baryonicisocurvature fluctuations can also be generated unless the baryogenesis occursafter the decay of the curvaton. We calculate the non-linearity parameter f_NLand the baryonic isocurvature fluctuations, taking account of the primordialfluctuations of both the inflaton and the curvaton. We show that, althoughcurrent constraints on isocurvature fluctuations are severe, the non-linearityparameter can be large as f_NL \sim O(10-100) without conflicting with theconstraints.

Non-Gaussianity and Baryonic Isocurvature Fluctuations in the Curvaton Scenario