# The Bi-Spinor Standard Model with 3 Generations

## TL;DR

This paper proposes that in a bi-spinor version of the Standard Model with four generations, only three are observable due to mass degeneracy, and it better fits flavor mixing data than the traditional Standard Model.

## Contribution

It introduces a bi-spinor Standard Model framework with four generations and demonstrates its consistency with electroweak data and flavor textures.

## Key findings

- Only three generations are observable due to mass degeneracy.
- Bi-spinor Standard Model matches electroweak precision variables as well as the Standard Model.
- It provides a better fit to flavor mixing textures than the conventional Standard Model.

## Abstract

We show that if two of four generations of the bi-spinor Standard Model are mass-degenerate or sufficiently close in mass only three generations can be observed. We argue that the Standard Model and its bi-spinor analog are indistinguishable on the level of the electroweak precision variables S, T, U. As a result the bi-spinor Standard Model, which describes experimental observed textures of flavor mixing matrices is a better fit to the data then the Standard Model, where the textures are arbitrary.

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Source: https://tomesphere.com/paper/1906.02193