Type I + II seesaw in a Two Higgs Doublet Model

Abstract

Two Higgs Doublet Models (2HDM) are popular extensions of the Standard Model for several reasons, but do not explain neutrino masses. In this work, we investigate how one can incorporate neutrino masses within the framework of the 2HDM-U(1), where U(1) is an abelian gauge symmetry used to nicely address the absence of flavor changing neutral currents in 2HDM. In particular, we explore realizations of the type I and type II seesaw since they are mechanisms that we dote on for being able to generate elegantly small active neutrino masses. We show that one can build several models featuring type I, type II and type I+II seesaw mechanism with different phenomenological implications.

Consistency of gauged two Higgs doublet model: gauge sector

“…We note that the 2HDM augmented with an extra local abelian (1) has been discussed in the literature [32][33][34][35][36][37] to address neutrino masses, dark matter and to avoid FCNC interactions at the tree level.…”

Effects of new heavy fermions on complex scalar dark matter phenomenology in gauged two Higgs doublet model

“…In contrast, they are grouped with new heavy right-handed neutrinos ν H l R to form SU (2) H doublets in G2HDM. There are several models that impose additional gauge symmetry on 2HDM to solve flavor problem, dark matter and neutrino masses, see for instance [46][47][48][49][50][51]. In Table 1, we list the matter contents of the G2HDM model and their associated quantum numbers.…”

Complex scalar dark matter in the gauged two-Higgs-doublet model

“…Here in G2HDM, they are grouped with new heavy right-handed neutrinos ν H lR to form SUð2Þ H doublets instead. For other related ideas extending the 2HDM with extra gauge symmetries to address flavor problem, dark matter, and neutrino masses, see, e.g., [41][42][43][44][45][46]. The matter contents of the G2HDM model and their respective quantum numbers are listed in Table I.…”