Abstract
The existence of light sterile neutrinos, as predicted in several models, can help to explain a number of observations starting from dark mater to recent anomalies in short baseline experiments. In this paper we consider two models - Left-Right Symmetric Zee model and Extended Seesaw model, that can naturally accommodate the presence of light sterile neutrinos in the eV to MeV mass scale. We perform a detailed study on the neutrinoless double beta decay process which receives major contributions from diagrams involving these light sterile neutrinos. Considering a number of theoretical and experimental constraints, including light neutrino masses and mixings, unitarity of the mixing matrix etc., we compare our predicted values of the half-life of neutrinoless double beta decay with the experimental limits. This can put significant constraints on the neutrino mass, active-sterile neutrino mixing and several other important parameters in these models.
Highlights
The Standard Model (SM) of particle physics, despite its major successes, is unable to explain the observed light neutrino mass splittings and their mixings, which provides a strong motivation to invoke beyond the Standard Model (BSM) physics
We have considered a variation of the type-I seesaw model referred as the extended seesaw model [14,15] and a left-right symmetric extension of radiative neutrino mass model [16–19]
The pair production and decay of the singly charged Higgs boson can produce final states with two charged leptons and missing transverse energy. This process has been studied in the context of the Large Hadron Collider (LHC) in Ref. [18,24] and for the International Linear Collider (ILC) and the Compact Linear Collider (CLIC) in Ref. [19]
Summary
The Standard Model (SM) of particle physics, despite its major successes, is unable to explain the observed light neutrino mass splittings and their mixings, which provides a strong motivation to invoke beyond the Standard Model (BSM) physics. The type-I seesaw serves as the most economical framework, as the model in addition to the SM particles are minimally extended by gauge singlet right-handed neutrinos Another popular class of mechanism is the radiative mass generation [9–13], where neutrino mass is generated via a loop effect. These three parameters are the lightest neutrino mass, the Dirac CP phase, and the mixing angle between the left and right gauge bosons By varying these parameters, we identify the regions which can be ruled out from the experimental limits on the half-life of the 0νββ process.
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