非表示:
キーワード:
High Energy Physics - Phenomenology, hep-ph
要旨:
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 we
outline. Finally, we sketch possible extensions to the quark sector and discuss
its implications for the LHC, especially how an enhanced diphoton rate for the
resonance at 125 GeV can be explained within this model.
