Gauge Baryon Number and Dibaryonic Dark Matter

TL;DR

This paper proposes extending the Standard Model by gauging baryon number, leading to a residual global symmetry that stabilizes a potential dark matter candidate with baryon number 2.

Contribution

It introduces a model where baryon number is gauged and spontaneously broken, resulting in a stable dark matter candidate with baryon number 2.

Findings

Gauging baryon number leads to a residual global symmetry.

A neutral scalar with baryon number 2 can be a long-lived dark matter candidate.

The model maintains anomaly cancellation with vectorlike fermions.

Abstract

The minimal standard model of quarks and leptons is extended with a set of vectorlike fermions to allow baryon number $B$ to become a gauged $U(1)_B$ symmetry. The $B$ assignments of the new particles are determined by renormalizable interactions with the known quarks through a color triplet scalar diquark. The spontaneous breaking of $U(1)_B$ by a scalar with $B=3$ results in a conserved residual global $B$ symmetry. A singlet neutral scalar with $B=2$ is a possible long-lived dark-matter candidate.