Local Baryon Number at the LHC

TL;DR

This paper explores a minimal baryon number breaking model predicting new fermions, including dark matter candidates, with distinctive collider signatures and discusses current experimental constraints and potential signals at the LHC.

Contribution

It introduces a minimal low-scale baryon number breaking theory with new fermions, analyzing their production, decay, and experimental signatures at the LHC.

Findings

Constraints from current LHC searches are evaluated.

Predictions for exotic decay channels like $h o \gamma Z_B$ are provided.

Potential signatures include multi-lepton events and long-lived charged particles.

Abstract

The minimal theory in which baryon number is spontaneously broken at the low scale predicts new fermions, one of which is a dark matter candidate, from gauge anomaly cancellation. We discuss the production mechanisms and decays of these new fermions, which include channels with multi-leptons, and channels with long-lived charged fermions that can give rise to exotic signatures with 'kinked' tracks at the Large Hadron Collider. We evaluate the contraints on the theory from current LHC searches and measurements, and briefly comment on the excess in top pair production at threshold recently reported by CMS. We also discuss predictions for the $h \to \gamma Z_B$ decay, where $h$ is the SM-like Higgs and $Z_B$ is the new gauge boson associated with baryon number.