Gauge coupling flux thresholds, exotic matter and the unification scale in F-SU(5) GUT

TL;DR

This paper investigates how gauge fluxes and exotic matter in F-theory SU(5) GUT models influence the unification scale, proton decay suppression, and gaugino mass implications.

Contribution

It provides a detailed analysis of conditions under which exotic matter affects the unification scale and proton decay constraints in F-theory GUT models.

Findings

Exotic matter can raise the unification scale under certain conditions.

Color triplets can be made heavy to prevent rapid proton decay.

Implications for gaugino mass patterns are discussed.

Abstract

We explore the gauge coupling relations and the unification scale in F-theory SU(5) GUT broken down to the Standard Model by an internal U(1)Y gauge flux. We consider variants with exotic matter representations which may appear in these constructions and investigate their role in the effective field theory model. We make a detailed investigation on the conditions imposed on the extraneous matter to raise the unification scale and make the color triplets heavy in order to avoid fast proton decay. We also discuss in brief the implications on the gaugino masses.