Title: Majoron Echoes of Leptogenesis
Abstract: If lepton number is spontaneously broken, the associated pseudo goldstone boson is known as the majoron. In this talk, I will discuss the majoron in the context of vanilla leptogenesis. If the majoron is lighter than MeV it can be all of dark matter. If the majoron is heavier than MeV it cannot be all of dark matter. The scale of vanilla leptogenesis implies an irreducible production of majoron. I will discuss the majoron both in the sub MeV and super MeV regimes and the associated cosmological and astrophysical constraints.
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