Neutrino Mixing via the Neutrino Portal
Alexei Y Smirnov

TL;DR
This paper explores a unified framework linking quark and lepton mixings through a neutrino portal, involving grand unification and hidden sectors with specific flavor symmetries, providing new models for neutrino mass and mixing.
Contribution
It introduces novel high and low energy realizations of neutrino mixing models based on GUT and hidden sectors, expanding the theoretical understanding of flavor symmetries and neutrino mass mechanisms.
Findings
Relation between lepton and quark mixings derived
Two realizations of the model presented: GUT-based and low-energy scale
Implications for neutrino mass smallness and flavor symmetries
Abstract
Relation between the lepton and quark mixings: , where is the BM or TBM mixing matrices, implies the quark-lepton (Grand) unification and existence of hidden sector with certain flavor symmetries. The latter couples to the visible sector via the neutrino portal and is responsible for , as well as for smallness of neutrino mass. GUT ensures appearance of in the lepton mixing. General features of this scenario (inverse or double seesaw, screening of the Dirac structures, basis fixing symmetry) are described and two realizations are presented. The high energy realization is based on GUT with the hidden sector at the Planck scale. The low energy realization includes the 100 TeV scale symmetry and the hidden sector at the keV - MeV scale.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Neutrino Physics Research · Astrophysics and Cosmic Phenomena
