TeV Window to Grand Unification: Higgs's Light Color Triplet Partner

TL;DR

This paper discusses the $T$-particle, a color triplet partner of the Higgs, as a low-energy probe connecting grand unification, baryon number violation, and neutrino mass origin through collider and neutron experiments.

Contribution

It highlights the $T$-particle's role in linking collider signatures, proton decay, and neutron disappearance searches as a novel approach to probing grand unification.

Findings

$T$-particle can be produced in colliders.

Correlated signals between proton decay and neutron disappearance.

$T$-particle links grand unification with neutrino mass and baryon violation.

Abstract

The color-triplet partner of the Higgs doublet, called a $T$-particle, is a universal feature of Grand Unification. It has been shown some time ago that this particle can be accessible for direct production in collider experiments. In this paper we point out that the $T$-particle represents a simultaneous low-energy probe of baryon number violation as well as of the origin of the neutrino mass, linking the mediation of proton decay with oscillations of the neutron into a sterile neutrino. We point out a triple correlation between its collider signatures, proton decay measurements and the searches for the magnetic resonance disappearance of free neutrons in cold neutron experiments. In this way, the $T$-particle can provide a diversity of correlated experimental windows into Grand Unification.