Noncommutative Compactifications of Type I Strings on Tori with Magnetic Background Flux

TL;DR

This paper constructs noncommutative toroidal compactifications of Type I strings with magnetic flux, leading to chiral fermions and supersymmetry breaking, and explores their potential to realize Standard Model or GUT-like theories.

Contribution

It introduces a novel framework for Type I string compactifications with magnetic flux on D-branes, resulting in noncommutative internal geometries with phenomenologically relevant features.

Findings

Realization of chiral fermions in noncommutative compactifications

Natural supersymmetry breaking mechanisms identified

Potential to reproduce Standard Model or GUT-like spectra

Abstract

We construct six- and four-dimensional toroidal compactifications of the Type I string with magnetic flux on the D-branes. The open strings in this background probe a noncommutative internal geometry. Phenomenologically appealing features such as chiral fermions and supersymmetry breaking in the gauge sector are naturally realized by these vacua. We investigate the spectra of such noncommutative string compactifications and in a bottom-up approach discuss the possibility to obtain the standard or some GUT like model.