A SCHEMATIC MODEL OF GENERATION STRUCTURE

Existence-form of matter behind the 3 generation structure for "cold-sector generations" is investigated. We emphasize the viewpoint that the 8 quantum numbers, which are composed of the freedom of electroweak structure with weak-isodoublet 2, color 3 and the quantum number embedded in generation structure 3, should be supposed to be the fundamental ones. Then, a prototype of model is proposed, where the origin of the generation quantum number as well as color is naturally explained in the framework of "naive" model. Further, possible refined model taking into account the restriction from our model is also investigated. Our model predicts the possible existence of "hot-sector generations" with 3 + 1 structure.