Zee Model with Flavor Dependent Global $U(1)$ Symmetry

Abstract

We study a simple extension of the Zee model, in which a discrete $Z_2$ symmetry imposed in the original model is replaced by a global $U(1)$ symmetry retaining the same particle content. Due to the $U(1)$ symmetry with flavor dependent charge assignments, the lepton sector has an additional source of flavor violating Yukawa interactions with a controllable structure, while the quark sector does not at tree level. We show that current neutrino oscillation data can be explained under constraints from lepton flavor violating decays of charged leptons in a successful charge assignment of the $U(1)$ symmetry. In such scenario, we find a characteristic pattern of lepton flavor violating decays of additional Higgs bosons, which can be a smoking gun signature at collider experiments.

Discussion for mu-e conversion added, Sec. A-4 added, references added and Typos fixed

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Cited by in corpus (7)

• Collider Constraints on Lepton Flavor Violation in the 2HDM
• Higgs boson decays with lepton flavor violation in the $B-L$ symmetric SSM
• Radiative generation of neutrino masses in a 3-3-1 type model
• Minimal Zee model for lepton $g-2$ and $W$-mass shifts
• Probing chirality structure in lepton-flavour-violating Higgs decay $h\to \tau \mu$ at the LHC
• Zee model with quasidegenerate neutrino masses and where to find it
• Natural 2HDMs without FCNCs