Insensitive Unification of Gauge Couplings

TL;DR

This paper proposes a model extending the standard model with vector-like families that achieves gauge coupling unification, maintains stability of the Higgs potential, and avoids rapid proton decay, with insensitivity to fundamental parameters.

Contribution

It introduces a novel extension with vector-like families that enables gauge unification and stability without fine-tuning or rapid proton decay.

Findings

Gauge couplings unify at a high scale

Electroweak minimum remains stable

Model insensitivity to fundamental parameters

Abstract

The standard model extended by three vector-like families with masses of order 1 TeV -- 100 TeV allows for unification of gauge couplings. The values of gauge couplings at the electroweak scale are highly insensitive to fundamental parameters. The grand unification scale is large enough to avoid the problem with fast proton decay. The electroweak minimum of the Higgs potential is stable.