Speaker
Description
We investigate both resonant and non-resonant thermal leptogenesis in the context of the recently proposed ``asymmetric texture'' from $SU(5)$ GUT with $\mathcal{T}_{13}$ family symmetry. A single source of $CP$ violation, originating from the vacuum alignment of the seesaw familons resulting in a complex tribimaximal mixing, is shown to yield Dirac $CP$ violation in agreement with global fits, and successfully explains baryon asymmetry via leptogenesis. For the non-resonant case, the sign of the baryon asymmetry fixes the previously unresolved sign of the TBM phase. In the resonant scenario, right-handed neutrino masses can be as low as $\mathcal{O} (\text{GeV})$ and is within the sensitivity of experiments (e.g. SHiP, DUNE) searching for heavy neutral leptons.
