97 citations · 541 across the 27 of their papers we have counts for
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Number of zero-modes on magnetized orbifolds analyzed by modular transformation
Shota Kikuchi, Tatsuo Kobayashi, Kaito Nasu +2
We study fermion zero-mode wavefunctions on orbifold with background magnetic fluxes. The number of zero-modes is analyzed by use of modular transforma…
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…
The spatial distribution of impact craters on Ryugu
Naoyuki Hirata, Tomokatsu Morota, Yuichiro Cho +40
Asteroid 162173 Ryugu has numerous craters. The initial measurement of impact craters on Ryugu, by Sugita et al. (2019), is based on Hayabusa2 ONC images obtained during the first…
Electrostatic Dust Ejection From Asteroid (3200) Phaethon With the Aid of Mobile Alkali Ions at Perihelion
Hiroshi Kimura, Katsuhito Ohtsuka, Shota Kikuchi +12
The asteroid (3200) Phaethon is known to be the parent body of the Geminids, although meteor showers are commonly associated with the activity of periodic comets. What is most pecu…
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…
Classifications of magnetized and orbifold models
Shota Kikuchi, Tatsuo Kobayashi, Kaito Nasu +1
We study constructions and classifications of three-generation models based on magnetized and orbifold as candidates of the compact space. We focus on chiral ferm…
Modular symmetry anomaly and non-perturbative neutrino mass terms in magnetized orbifold models
Shota Kikuchi, Tatsuo Kobayashi, Kaito Nasu +2
We study the modular symmetry anomaly in magnetized orbifold models. The non-perturbative effects such as D-brane instanton effects can break tree-level symmetry. We study which pa…
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.…