Deconstruction, G_2 Holonomy, and Doublet-Triplet Splitting

TL;DR

This paper proposes a novel mechanism using discrete symmetries to address the doublet-triplet splitting problem in supersymmetric GUTs, employing deconstruction and G_2 holonomy compactification.

Contribution

It introduces two new approaches for solving the doublet-triplet splitting problem, one through deconstruction and another via M-theory on G_2 holonomy manifolds.

Findings

Mechanism effectively separates Higgs doublets and triplets.

Two distinct methods demonstrate the approach's versatility.

Potential implications for realistic GUT model building.

Abstract

We describe a mechanism for using discrete symmetries to solve the doublet-triplet splitting problem of four-dimensional supersymmetric GUT's. We present two versions of the mechanism, one via ``deconstruction,'' and one in terms of M-theory compactification to four dimensions on a manifold of G_2 holonomy.