From Stringy Particle Physics to Moduli Stabilisation and Cosmology

TL;DR

This paper explores how intersecting D6-branes in string theory can stabilize moduli, generate axions, and connect stringy models to particle physics and cosmology, demonstrated through an explicit example.

Contribution

It provides an explicit model showing the stabilization of deformation moduli and the emergence of QCD axions from open strings in intersecting D6-brane setups.

Findings

Moduli stabilization achieved via D6-branes at orbifold singularities

QCD axion can originate from open string sectors

Explicit model illustrating the interplay of stringy features

Abstract

Intersecting D6-branes provide a geometrically intuitive road to stringy particle physics models, where D6-branes stuck at orbifold singularities can lead to the stabilisation of deformation moduli, and the QCD axion can arise from the open string sector in a very constrained way compared to pure field theory. We demonstrate this interplay of different physical features here through an explicit model.