88 citations · 1.1k across the 91 of their papers we have counts for
42 papers · 1 filter
Textures of dimension-six operators in the SMEFT with non-invertible selection rules
Tatsuo Kobayashi, Hajime Otsuka, Morimitsu Tanimoto +1
We investigate the flavor structures of dimension-six operators in the Standard Model Effective Field Theory (SMEFT) subject to non-invertible selection rules. In particular, we cl…
Generalized CP from non-invertible selection rules
Tatsuo Kobayashi, Hajime Otsuka
We study a framework in which fields are labeled by basis elements of a fusion algebra with non-invertible fusion rules. In particular, we consider the case where fields are labele…
GUT-motivated non-invertible symmetry as a solution to the strong CP problem and the neutrino CP-violating phase
Tatsuo Kobayashi, Hajime Otsuka, Morimitsu Tanimoto +1
The unsuppressed CP violation in QCD is a problem in the standard model. If we have some mechanism to guarantee real determinants of the quark mass matrices, the vanishing physical…
Stringy Constraints on Modular Flavor Models
Keiya Ishiguro, Takafumi Kai, Tatsuo Kobayashi +1
We investigate stringy constraints on moduli spaces in modular flavor models by analyzing moduli-dependent threshold corrections in heterotic string vacua. While moduli play a cruc…
Non-invertible Symmetry as a Solution to the Strong CP Problem in a GUT-inspired Standard Model
Tatsuo Kobayashi, Hajime Otsuka, Tsutomu T. Yanagida
We propose a three-zero texture for the down-quark mass matrix within a GUT-inspired Standard Model, enforced by a non-invertible selection rule originating from $\mathbb{Z…
Matter symmetries in supersymmetric standard models from non-invertible selection rules
Tatsuo Kobayashi, Hironobu Mita, Hajime Otsuka +1
We discuss phenomenological implications of non-invertible selection rules in the framework of the supersymmetric standard model. We find that a remnant symmetry of…
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…
Lepton mass textures from non-invertible multiplication rules
Tatsuo Kobayashi, Hajime Otsuka, Morimitsu Tanimoto +1
We study the lepton mass textures, which are derived by gauging of symmetries. We can obtain various textures for the Yukawa couplings in the charged…
More about quark Yukawa textures from selection rules without group actions
Tatsuo Kobayashi, Yume Nishioka, Hajime Otsuka +1
We study the coupling selection rules associated with non-group symmetries, i.e., gauging of symmetries. We clarify which Yukawa textures can be deriv…
Yukawa textures from non-invertible symmetries
Tatsuo Kobayashi, Hajime Otsuka, Morimitsu Tanimoto
Phenomenological aspects of non-invertible symmetries, in particular the flavor structure of quarks and leptons, are studied. We start with a discrete symmetry and g…
Spontaneous CP violation and partially broken modular flavor symmetries
Tetsutaro Higaki, Tatsuo Kobayashi, Kaito Nasu +1
We study the realization of spontaneous CP violation through moduli stabilization. In modular flavor models, the source of CP violation is the vacuum expectation values of the comp…
Novel moduli space in modular flavor models : a case study for modular seesaw model with hidden gauge symmetry
Keiya Ishiguro, Takaaki Nomura, Hiroshi Okada +2
We study flavor phenomenologies in a basis of a double covering of modular group with a hidden symmetry, in which we work on regions at nearby two fixed points and th…
Modular flavor models with positive modular weights: a new lepton model building
Tatsuo Kobayashi, Takaaki Nomura, Hiroshi Okada +1
We propose an interesting assignment of positive modular wights for fields in a modular non-Abelian discrete flavor symmetry. By this assignment, we can construct inverse seesaw an…
Texture zeros realization in a three-loop radiative neutrino mass model from modular symmetry
Takaaki Nomura, Hiroshi Okada, Hajime Otsuka
We derive verifiable two-zero textures in the framework of a three-loop induced neutrino mass model applying a modular symmetry for the lepton sector. Interestingly, the neut…
Exploring the flavor structure of quarks and leptons with reinforcement learning
Satsuki Nishimura, Coh Miyao, Hajime Otsuka
We propose a method to explore the flavor structure of quarks and leptons with reinforcement learning. As a concrete model, we utilize a basic value-based algorithm for models with…
Moduli inflation from modular flavor symmetries
Yoshihiko Abe, Tetsutaro Higaki, Fumiya Kaneko +2
We study slow-roll inflation model controlled by the modular flavor symmetry. In the model, the modulus field plays a role of inflaton and the introduction of the stabilizer field…
Pseudo-Nambu-Goldstone Dark Matter from Non-Abelian Gauge Symmetry
Hajime Otsuka, Takashi Shimomura, Koji Tsumura +2
We propose a pseudo-Nambu-Goldstone boson (pNGB) dark matter (DM) model based on an additional non-Abelian gauge symmetry . The gauge symmetry is spontaneously b…
Generalized Matter Parities from Finite Modular Symmetries
Tatsuo Kobayashi, Satsuki Nishimura, Hajime Otsuka +2
We classify a supersymmetric extension of the Standard Model by discrete symmetries originating from finite modular symmetries . Since all the couplings in supersymmetric theo…
Residual flavor symmetry breaking in the landscape of modular flavor models
Keiya Ishiguro, Hiroshi Okada, Hajime Otsuka
We study a symmetry breaking of residual flavor symmetries realized at fixed points of the moduli space. In the supersymmetric modular invariant theories, a small departure of the…
Phenomenological implications on a hidden sector from the Festina Lente bound
Kayoung Ban, Dhong Yeon Cheong, Hiroshi Okada +3
We apply the Festina Lente (FL) bound on a hidden sector with gauge symmetries. Since the FL bound puts a lower bound on masses of particles charged under the gauge s…
Lepton flavor violation, lepton and electron EDM in the modular symmetry
Tatsuo Kobayashi, Hajime Otsuka, Morimitsu Tanimoto +1
We study the lepton flavor violation (LFV), the leptonic magnetic moments and the electric dipole moment (EDM) of the electron in the Standard-Model Effective Fiel…
Modular symmetry of soft supersymmetry breaking terms
Shota Kikuchi, Tatsuo Kobayashi, Kaito Nasu +3
We study the modular symmetry of soft supersymmetry breaking terms. Soft scalar masses and -term coefficients are invariant under the modular symmetry when we regard -term as…
Radiative neutrino masses from modular symmetry and supersymmetry breaking
Hajime Otsuka, Hiroshi Okada
We investigate a modular invariant two-loop neutrino mass model in a supersymmetric framework, where we introduce new fields as minimum as possible, expecting contributions o…
4D modular flavor symmetric models inspired by higher dimensional theory
Shota Kikuchi, Tatsuo Kobayashi, Hajime Otsuka +3
We study a scenario to derive four-dimensional modular flavor symmetric models from higher dimensional theory by assuming the compactification consistent with the modular symmetry.…