Quark mass hierarchies in heterotic orbifold GUTs

TL;DR

This paper explores how string-derived heterotic orbifold GUT models can explain quark mass hierarchies through calculated Yukawa couplings, revealing an interesting pattern from string theory mechanisms.

Contribution

It introduces a method to calculate Yukawa couplings in heterotic orbifold GUTs and analyzes their role in quark mass hierarchies, highlighting new string theory mechanisms.

Findings

Identification of mechanisms leading to quark mass hierarchies

Concrete examples from heterotic orbifold compactifications

Pattern of Yukawa couplings consistent with observed hierarchies

Abstract

We discuss how to calculate Yukawa couplings in string-derived orbifold GUTs. As an application we investigate the quark mass hierarchies in these models. An interplay of different mechanisms derived from string theory leads to an interesting pattern. We discuss concrete examples in the context of heterotic orbifold compactifications.