Abstract
We propose a left-right symmetric framework with universal seesaw mechanism for the generation of masses of the Standard Model quarks and leptons. Heavy vector-like singlet quarks and leptons are required for generation of Standard Model-like quark and lepton masses through seesaw mechanism. A softly broken $Z_2$ symmetry distinguishes the lepton sector and the quark sector of the model. This leads to the presence of some lepton-specific interactions that can produce unique collider signatures which can be explored at the current Large Hadron Collider run and also future colliders.
Highlights
Left-right symmetric (LRS) models [1] are one of the most well-motivated and widely studied extensions of the Standard Model (SM)
In this work we have proposed a model for SM fermion mass generation through a universal seesaw mechanism
The model is based on a left-right symmetric framework where all the gauge symmetries are spontaneously broken via SUð2Þ scalar doublets only
Summary
Left-right symmetric (LRS) models [1] are one of the most well-motivated and widely studied extensions of the Standard Model (SM). To arrange the lepton-specific framework, we need to introduce an extra Z2 symmetry under which a couple of Higgs boson doublets as well as the heavy lepton singlet fields are odd, all other fields being even. As these odd-Z2 Higgs bosons get a nonzero vacuum expectation value (VEV), one expects this discrete Z2 symmetry to be spontaneously broken. This could lead to domain walls and can make the model unstable from a cosmological point of view [6].
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