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Dive into the research topics where Norihito Toyota is active.

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Featured researches published by Norihito Toyota.


European Physical Journal A | 1990

Integral dimension in the string theory based on a group manifold

Norihito Toyota

We study string models on a group manifold with Kac-Moody symmetry where the critical dimensiond is integer. In particular the possibility of fourdimensional models is investigated. We find that only nine group manifolds with a relevant level can have four as the critical dimension among an infinite number of compact Lee groups. They re all listed. The models with minimal conformal sectors adding to the Kac-Moody sector are investigated. In the cases with one minimal conformal sector, there are only two groups,SU (5) andSO (43), that can gived=4. Among the cases with some tensoring products of minimal conformal sectors we discuss a few special cases withk=0 andk=1. The cases based onN=1 super Kac-Moody algebra are also studied. Finally we discuss the possibility of the enlargement of gauge symmetry.


Physics Letters B | 1987

Mac hypothesis in a superstring inspired model

Norihito Toyota

Abstract We study a superstring inspired E6 model based on the MAC hypothesis. We find two kinds of model in which the proton decay through the colored Higgs is naturally suppressed and every field in 27 of E6 carries a role; a pair of colored fields in 27 are necessary to cause the MAC condensation and two doublet fields in 27 cause the usual Higgs mechanism at the electroweak breaking. The fields left in 27 are identified with quarks and leptons adding to vLc.


Physical Review D | 1987

Skyrme Model Lagrangian in Quantum Mechanics: SU(2) Case

Kanji Fujii; Alexandr Kobushkin; Norihito Toyota; Ki-ichiro Sato


Progress of Theoretical Physics | 1987

Octet Dominance of Weak Transition in SU(3) Skyrme Model

Norihito Toyota


Proceedings of the International Conference on Geometry, Integrability and Quantization | 2000

Induced Gauge Structure in Quantum Theory from the Viewpoint of the Confining Potential Approach

Kanji Fujii; Norihito Toyota; Satoshi Uchiyama


Physical Review D | 1988

Quantum-mechanical aspects of SU(3) Skyrme model in collective-coordinate quantization.

Kanji Fujii; Ki-ichiro Sato; Norihito Toyota


Progress of Theoretical Physics | 1986

Weak Transitions of Low Lying Baryons in Skyrme and Quark Models

Norihito Toyota; Kanji Fujii


arXiv: High Energy Physics - Phenomenology | 2016

Remark on Structure of Expectation Values of Flavor-Lepton Numbers with respect to Neutrino-Source Hadron States: Deviation from Fermi's Golden Relatio

Kanji Fujii; Norihito Toyota


Systems and Computers in Japan | 2000

Sequencing of instructional terms based on cluster analysis with weighted graph

Norihito Toyota; Takeo Saegusa


Presented at | 1987

SKYRME MODEL LAGRANGIAN IN QUANTUM MECHANICS

Kanji Fujii; Norihito Toyota; Alexander Kobushkin; Ki-ichiro Sato

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