Supersymmetric Standard Model from String Theory

TL;DR

This paper constructs a four-dimensional N=1 supersymmetric standard model from a twenty-six-dimensional bosonic string, demonstrating the emergence of three generations and preserving supersymmetry without breaking it.

Contribution

It presents a novel string-theoretic construction of the supersymmetric standard model with three generations from a 26D bosonic string, maintaining supersymmetry.

Findings

Gauge symmetry reduces to the supersymmetric standard model in 4D.

The model naturally includes three generations.

Supersymmetry remains unbroken in the construction.

Abstract

N=1, D=4 Superstring possessing $SO(6)\otimes SO(5)$ symmetry action and with the same gauge symmetry obtained from zero mass spectrum of vector meson as well, is constructed from the bosonic string in twenty six dimensions. Without breaking supersymmetry, the gauge symmetry of the model descends to the supersymmetric standard model of the electroweak scale in four dimension.It is proved that there can be three generations in the model