Setting the Stage for a Non-Supersymmetric UV-Complete String Phenomenology

TL;DR

This paper explores the construction of non-supersymmetric heterotic string models with enhanced stability, modular invariance, and potential for realistic phenomenology, advancing non-supersymmetric string model-building.

Contribution

It introduces a framework for building stable, non-supersymmetric string models that resemble the Standard Model, with suppressed cosmological constants and UV finiteness.

Findings

Models exhibit exponentially suppressed dilaton tadpoles and cosmological constants.

Maintains modular invariance and misaligned supersymmetry for UV finiteness.

Potential for realistic phenomenological applications.

Abstract

In this talk, I discuss our recent work concerning the construction of non-supersymmetric heterotic string models which have exponentially suppressed dilaton tadpoles and cosmological constants, and thus greatly enhanced stability properties. The existence of such models opens the door to non-supersymmetric string model-building, and I discuss how semi-realistic string models resembling the Standard Model or any of its unified variants may be constructed within this framework. These models maintain modular invariance and exhibit a misaligned supersymmetry which ensures UV finiteness, even without spacetime supersymmetry. I also discuss the potential implications for phenomenology.