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Leptogenesis and the Dirac Phase

Drewes, Marco

The mounting evidence for CP violation in the leptonic sector raises the question to which degree a measurement of the Dirac phase can reveal information on leptogenesis as a possible origin of the baryonic matter in the universe. While the Dirac phase is irrelevant for the simplest "vanilla leptogenesis" scenario, it can play an important role in scenarios where flavour effects are important. We report recent progress in the theoretical treatment of such scenarios. We focus on low scale seesaw models in which the heavy neutrinos that drive leptogenesis can be searched for experimentally, and a combination of data from high energy experiments with searches for neutrinoless double beta decay and long baseline neutrino experiments can be used to test leptogenesis.

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