Abstract
The Zee model for Dirac neutrinos is one of the simplest models featuring one-loop Dirac neutrino masses. The interactions between the new scalars (two singly-charged fields) and neutrinos induce general neutrino interactions (GNI) which, as a generalisation of the non standard neutrino interactions, constitute an additional tool to probe models beyond the SM like this. In this work, we consider a $U(1)_{{B-L}}$ gauge symmetry as the responsible for the Diracness of the neutrinos and the radiative character of the neutrino masses. We determine the viable parameter space consistent with neutrino oscillation data, leptonic rare decays and collider constraints, and establish the most relevant experimental prospects regarding lepton flavor violation searches and GNI in future solar neutrino experiments.
Highlights
After several decades of research dedicated to neutrino physics [1,2], the underlying mechanism behind the massiveness of neutrinos remains one of the unresolved conundrums of the Standard Model (SM)
The yet-to-be determined question of whether neutrinos are different from their antiparticles [3] and the lack of signatures of lepton flavor violation (LFV) in the charged sector [4,5] make the landscape even more unclear
II we present the model and discuss the neutrino mass generation, the LFV processes, and LHC signatures
Summary
After several decades of research dedicated to neutrino physics [1,2], the underlying mechanism behind the massiveness of neutrinos remains one of the unresolved conundrums of the Standard Model (SM). As occurs in the original Zee model [29,30], neutrino masses are generated at one loop with the SM charged leptons running inside the loop, which is closed thanks to a trilinear interaction term between the charged scalars and the Higgs field.
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