Predictive scotogenic model with flavor dependent symmetry

Abstract

In this paper, we propose a viable approach to realise two texture-zeros in the scotogenic model with flavor dependent U (1) B−2Lα−L β gauge symmetry. These models are extended by two righthanded singlets N Ri and two inert scalar doublets η i , which are odd under the dark Z 2 symmetry.Among all the six constructed textures, texture A 1 and A 2 are the only two allowed by current experimental limits. Then choosing texture A 1 derived from U (1) B−2Le−Lτ , we perform a detail analysis on the corresponding phenomenology such as predictions of neutrino mixing parameters, lepton flavor violation, dark matter and collider signatures. One distinct nature of such model is that the structure of Yukawa couplingLηN R is fixed by neutrino oscillation data, and can be further tested by measuring the branching ratios of charged scalars η ± 1,2 .

Simple theory for scotogenic dark matter with residual matter-parity

“…Assuming this scalar to be the lightest "odd particle" it will be dark matter, with its stability naturally ensured by the residual matter-parity gauge symmetry. This gives an elegant scotogenic realization of inert doublet scenarios of dark matter, extensively explored in a number of recent works [32][33][34][35][36][37][38][39][40][41].…”

A renormalizable left-right symmetric model with low scale seesaw mechanisms

“…The resulting constraints can therefore be fulfilled for an appropriate region of parameter space, along similar lines of Refs. [8,10,11]. A detailed study of the implications of our model in dark matter is beyond the scope of this work and will be done elsewhere.…”

Flavour and dark matter in a scoto/type-II seesaw model

“…Several scoto-inspired models have been explored relying on different kinds of fermionic and/or scalar extensions, as well as on imposing additional symmetries (see, e.g., refs. [32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47]). Typically, these models enlarge the viable parameter space for DM and neutrino mass generation due to the presence of new interactions, opening up the possibility for exotic collider signatures.…”