A Stable Massive Charged Particle

TL;DR

This paper explores the theoretical possibility of stable massive charged particles within an extended standard model, highlighting conditions under which such particles could be absolutely stable, especially focusing on doubly charged particles.

Contribution

It introduces a minimal extension to the standard model that allows for the existence of absolutely stable doubly charged particles.

Findings

Singly charged stable particles are not possible without additional symmetries.

Doubly charged particles can be absolutely stable within this model.

The stability depends on the particle's charge and the model's symmetry assumptions.

Abstract

We consider the possibility of the existence of a stable massive charged particle by a minimal extension of the standard model particle content. Absolute stability in the case of singly charged particle is not possible if the usual doublet Higgs exists, unless a discrete symmetry is imposed.But a doubly charged particle is absolutely stable.