Speaker
Description
Constrained Sequential neutrino Dominance of type 2 (referred to as CSD2) is an attractive building block for Grand Unified Theory (GUT) flavour models because it predicts a non-zero leptonic mixing angle $\theta_{13}^{PMNS}$, a deviation of $\theta_{23}^{PMNS}$ from $\pi /4$, as well as a leptonic Dirac CP phase $\delta^{PMNS}$ which is directly linked to the CP violation relevant for generating the baryon asymmetry via the leptogenesis mechanism. When embedded into GUT flavour models, these predictions are modified in a predictive way, depending on which GUT operators are responsible for generating the fermion Yukawa matrices. In this paper, we systematically investigate and classify the resulting predictions from $\mathrm{SU}(5)$ based flavour models, in order to select the most promising routes for future model building.
