Based on the generalized gauge theory on M4 ×Z2 ×Z3, we reconstructed the realistic SU(5) Grand Unified model by a suitable assignment of fermion fields. The action of group elements Z2 on fermion fields is the charge conjugation while the action of Z3 elements represent generation translation. We find that to fit the spontaneous symmetry breaking and gauge hierarchy of SU(5) model a linear ter...

In this paper, a general theory on unification of non-Abelian SU(N) gauge interactions and gravitational interactions is discussed. SU(N) gauge interactions and gravitational interactions are formulated on the similar basis and are unified in a semi-direct product group GSU(N). Based on this model, we can discuss unification of fundamental interactions of Nature. email address: [email protected]...

We examine the problem of constructing three generation free fermionic string models with grand unified gauge groups. We attempt the construction of G × G models, where G is a grand unified group realized at level 1. This structure allows those Higgs representations to appear which are necessary to break the symmetry down to the standard model gauge group. For G = SO(10), we find only models wi...

This paper studies the normalizability criterion for the one-loop wave function of the universe in a de Sitter background, when various unified gauge models are considered. It turns out that, in the absence of interaction between inflaton field and other matter fields, the supersymmetric version of such unified models is preferred. By contrast, the interaction of inflaton and matter fields, joi...

Unified theory of gravitational interactions and electromagnetic interactions is discussed in this paper. Based on gauge principle, electromagnetic interactions and gravitational interactions are formulated in the same manner and are unified in a semi-direct product group of U(1) Abel gauge group and gravitational gauge group. email address: [email protected] mailing address