Quark-Lepton Symmetry and Quartification in Five Dimensions

TL;DR

This paper explores five-dimensional models with Quark-Lepton symmetry, focusing on split fermions and quartification, to address proton decay suppression and flavor differences in particle sectors.

Contribution

It introduces a five-dimensional Quark-Lepton symmetric model with split fermions and compares quartification in higher dimensions to traditional four-dimensional models.

Findings

QL symmetry helps suppress proton decay

Fermionic geography explains flavor differences

Higher-dimensional quartification offers novel features

Abstract

We outline some features of higher dimensional models possessing a Quark-Lepton (QL) symmetry. The QL symmetric model in five dimensions is discussed, with particular emphasis on the use of split fermions. An interesting fermionic geography which utilises the QL symmetry to suppress the proton decay rate and to motivate the flavor differences in the quark and leptonic sectors is considered. We discuss the quartification model in five dimensions and contrast the features of this model with traditional four dimensional constructs.