Superstring Extension of the Standard Model and Gravitation

TL;DR

This paper discusses how certain four-dimensional superstring solutions can unify all fundamental interactions, including gravity, and extend the Standard Model up to very high energies, emphasizing the importance of string corrections for low-energy predictions.

Contribution

It introduces a class of superstring solutions that successfully extend the Standard Model and incorporate gravity, highlighting the significance of string corrections for low-energy phenomenology.

Findings

Superstring solutions unify all interactions including gravity.

Extension of the Standard Model up to the string scale (~10^{17} GeV).

String corrections impact low-energy gauge and Yukawa couplings.

Abstract

Some of the four-dimensional Superstring solutions provide a consistent framework for a Supersymmetric Unification of all interactions including gravity. A class of them extends successfully the validity of the standard model up to the string scale ${\cal O}(10^{17})~GeV$. We stress the importance of string corrections which are relevant for low energy ${\cal O}(1)~TeV$ predictions of gauge and Yukawa couplings as well as the spectrum of the supersymmetric particles after supersymmetry breaking.