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Mainz 2014 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 41: Neutrinophysik (Theorie)

T 41.2: Vortrag

Montag, 24. März 2014, 17:00–17:15, P108

Leptogenesis and CP violation in SU(5) models with lepton flavor mixing originating from the right-handed sector — •Erik Schumacher and Heinrich Päs — TU Dortmund, Deutschland

We discuss neutrino masses and mixing in the context of seesaw type I models with three right-handed Majorana neutrinos and an approximately diagonal Dirac sector. This ansatz is motivated by the idea that the flavor structure in the right-handed Majorana masses is responsible for the large mixing angles, whereas the small mixing angle θ13 originates from the Dirac Yukawa couplings in analogy to the quark sector. To obtain θ13 ≈ 0.15 we study a possible SU(5) GUT realization with a U(1) × Z2 × Z2 × Z2 flavor symmetry and include a complex perturbation parameter in the Dirac mass matrix. The consequences for CP violating phases and effects on leptogenesis are investigated.

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