Primordial non-Gaussianity as a probe of seesaw and leptogenesis
Chee Sheng Fong,
Anish Ghoshal,
Abhishek Naskar
et al.
Abstract:We present the possibility that the seesaw mechanism and nonthermal leptogenesis can be investigated via primordial non-Gaussianities in the context of a majoron curvaton model. Originating as a massless Nambu-Goldstone boson from the spontaneous breaking of the global baryon (B) minus lepton (L) number symmetry at a scale vB−L, majoron becomes massive when it couples to a new confining sector through anomaly. Acting as a curvaton, majoron produces the observed red-tilted curvature power spectrum without relyi… Show more
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