159 citations · 780 across the 34 of their papers we have counts for
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modular symmetry in flavor structures: quark flavor models and Siegel modular forms for
Shota Kikuchi, Tatsuo Kobayashi, Kaito Nasu +2
We study an approach to construct Siegel modular forms from . Zero-mode wave functions on with magnetic flux background behave Siegel modular forms at the origin. Th…
Quark mass hierarchies and CP violation in modular symmetric flavor models
Shota Kikuchi, Tatsuo Kobayashi, Kaito Nasu +2
We study modular symmetric flavor models to realize quark mass hierarchies and mixing angles without fine-tuning. Mass matrices are written in terms of…
Quark hierarchical structures in modular symmetric flavor models at level 6
Shota Kikuchi, Tatsuo Kobayashi, Kaito Nasu +2
We study modular symmetric quark flavor models without fine-tuning. Mass matrices are written in terms of modular forms, and modular forms in the vicinity of the modular fixed poin…
Quark and lepton flavor structure in magnetized orbifold models at residual modular symmetric points
Kouki Hoshiya, Shota Kikuchi, Tatsuo Kobayashi +1
We study quark and lepton mass matrices derived from magnetized orbifold models. Quark and lepton masses have a large hierarchy. In addition, mixing angles are l…
Texture zeros of quark mass matrices at fixed point in modular flavor symmetry
Shota Kikuchi, Tatsuo Kobayashi, Morimitsu Tanimoto +1
We study systematically derivation of the specific texture zeros, that is the nearest neighbor interaction (NNI) form of the quark mass matrices at the fixed point in modular…
Mass matrices with CP phase in modular flavor symmetry
Shota Kikuchi, Tatsuo Kobayashi, Morimitsu Tanimoto +1
We study the CP violation and the CP phase of quark mass matrices in modular flavor symmetric models. The CP symmetry remains at by a combination of the -symmetr…
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…
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.…
Yukawa textures in modular symmetric vacuum of magnetized orbifold models
Shota Kikuchi, Tatsuo Kobayashi, Yuya Ogawa +1
We study quark mass matrices derived from magnetized orbifold models. Yukawa matrices at three modular fixed points, and are invariant…
Gravitational waves from breaking of an extra in grand unification
Nobuchika Okada, Osamu Seto, Hikaru Uchida
In a class of gauged extended Standard Models (SMs), the breaking of the symmetry is not only a source for Majorana masses of right-handed (RH) neutrinos crucial for…
Flavor structure of magnetized blow-up models
Tatsuo Kobayashi, Hajime Otsuka, Hikaru Uchida
We discuss the flavor structure in a resolutions of magnetized orbifold models. The flavor structure of Yukawa couplings among chiral zero-modes is sensitive to…
violation in modular invariant flavor models
Tatsuo Kobayashi, Yusuke Shimizu, Kenta Takagi +3
We study the spontaneous violation through the stabilization of the modulus in modular invariant flavor models. The -invaraiant potentential has the minimum only at ${…
Finite modular subgroups for fermion mass matrices and baryon/lepton number violation
Tatsuo Kobayashi, Yusuke Shimizu, Kenta Takagi +3
We study a flavor model that the quark sector has the modular symmetry,while the lepton sector has the modular symmetry. Our model leads to characteristic quark mass ma…