Dynamical origin of Type-I Seesaw with large mixing
Author:
Yi Chung
Keyword:
High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph)
journal:
--
date:
2023-11-28 00:00:00
Abstract
We investigate Type-I Seesaw models where the right-handed neutrino masses are dynamically generated by strong interactions. Using horizontal gauge symmetry as the source of strong dynamics, a nontrivial flavor structure can also be introduced dynamically. We find that the right-handed neutrino mass matrix with a strongly anti-diagonal structure emerges when the three right-handed neutrinos are in the triplet representation of $SU(2)_H$ horizontal gauge symmetry. This structure is capable of accommodating the large mixing and weak hierarchy observed in the low-energy neutrino data with a hierarchical Dirac mass matrix. The neutrino puzzles can, therefore, be understood as the consequence of strong horizontal gauge interactions. We also discuss the potential UV completion and the phenomenology that could be tested in the future.