Lepton flavor at the electroweak scale: A complete A4 model
Martin Holthausen, Manfred Lindner, Michael A. Schmidt

TL;DR
This paper introduces a renormalizable A4 flavor symmetry model at the electroweak scale that explains lepton masses, mixings, and dark matter, with suppressed flavor violation and potential LHC signatures.
Contribution
It presents a novel electroweak scale A4 flavor symmetry model with a unique vacuum alignment mechanism, challenging the high-scale flavor symmetry paradigm.
Findings
Suppressed lepton flavor violating processes
Includes a viable dark matter candidate
Potential explanation for LHC diphoton resonance
Abstract
Apparent regularities in fermion masses and mixings are often associated with physics at a high flavor scale, especially in the context of discrete flavor symmetries. One of the main reasons for that is that the correct vacuum alignment requires usually some high scale mechanism to be phenomenologically acceptable. Contrary to this expectation, we present in this paper a renormalizable radiative neutrino mass model with an A4 flavor symmetry in the lepton sector, which is broken at the electroweak scale. For that we use a novel way to achieve the VEV alignment via an extended symmetry in the flavon potential proposed before by two of the authors. We discuss various phenomenological consequences for the lepton sector and show how the remnants of the flavor symmetry suppress large lepton flavor violating processes. The model naturally includes a dark matter candidate, whose phenomenology…
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