11 papers
A theoretical account of tiny multi-Higgs vacuum expectation values from non-invertible symmetry
Takaaki Nomura, Hiroshi Okada
We propose a novel mechanism to explain the naturally small vacuum expectation values (VEVs) of exotic multi-Higgs fields by employing non-invertible symmetries. Specifically, we i…
A Minimal Realization of Radiative Dirac Neutrino Masses via a Non-Invertible Fusion Rule
Takaaki Nomura, Hiroshi Okada, Yoshihiro Shigekami
We propose a minimal one-loop radiative framework for Dirac neutrino mass matrix. As a consequence, the Yukawa hierarchies among the SM fermions are alleviated, and radiative type-…
Zee-Babu model in a non-holomorphic modular symmetry and modular stabilization
Tatsuo Kobayashi, Hiroshi Okada, Yuta Orikasa
We study a Zee-Babu neutrino model in a non-holomorphic modular symmetry, and we construct a model so that there are minimum free parameters (two complex parameters). We find…
Radiative Dirac Neutrino Masses from Modular Symmetry in an Axion Model
Sin Kyu Kang, Ranjeet Kumar, Hiroshi Okada
We present a unified axion model framework that simultaneously addresses the origin of neutrino masses, leptonic flavor structure, the strong CP problem, and dark matter. The model…
Radiative neutrino mass models from non-invertible selection rules
Tatsuo Kobayashi, Hiroshi Okada, Hajime Otsuka
We apply non-invertible selection rules coming from a fusion algebra to radiative neutrino mass models where fields are labeled by the elements in the algebra. Since non-invertible…
Neutrino mass model at a three-loop level from a non-holomorphic modular symmetry
Takaaki Nomura, Hiroshi Okada
We study a three-loop induced neutrino mass scenario from a non-holomorphic modular flavor symmetry and reach the minimum scenario leading predictions of the lepton masses, m…