Norihito Toyota
Hokkaido University
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European Physical Journal A | 1990
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
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
Kanji Fujii; Alexandr Kobushkin; Norihito Toyota; Ki-ichiro Sato
Progress of Theoretical Physics | 1987
Norihito Toyota
Proceedings of the International Conference on Geometry, Integrability and Quantization | 2000
Kanji Fujii; Norihito Toyota; Satoshi Uchiyama
Physical Review D | 1988
Kanji Fujii; Ki-ichiro Sato; Norihito Toyota
Progress of Theoretical Physics | 1986
Norihito Toyota; Kanji Fujii
arXiv: High Energy Physics - Phenomenology | 2016
Kanji Fujii; Norihito Toyota
Systems and Computers in Japan | 2000
Norihito Toyota; Takeo Saegusa
Presented at | 1987
Kanji Fujii; Norihito Toyota; Alexander Kobushkin; Ki-ichiro Sato