# A Baryon and Lepton Number Violation Model Testable at the LHC

## TL;DR

This paper presents a model of baryon and lepton number violation that can be tested at the LHC, allowing for new physics at TeV scales despite proton decay constraints, and proposes signatures for experimental detection.

## Contribution

The authors construct a novel baryon and lepton number violating model with TeV-scale particles, compatible with proton decay limits, and identify unique LHC signatures for testing.

## Key findings

- Model allows TeV-scale new particles consistent with proton decay limits.
- Unique collider signatures identified for baryon number violation.
- Scenario for low-scale baryogenesis within the model.

## Abstract

Proton decay experiments typically constrain baryon number violation to the scale of grand unified theories. From a phenomenological point of view, this makes direct probing of the associated new resonances, such as the X and Y bosons, out of reach for even the most optimistic future experiments. It has, however, been known that certain specific patterns of baryon and lepton number violation can suppress proton decay by multiple powers of the masses of the heavy resonances involved, opening the possibility that the observed limits on the proton lifetime are consistent with baryon number violating physics at energy scales much lower than that of grand unification. We construct an explicit example of such a model which violates baryon number by one unit, $\Delta \text{B} = -1$, and lepton number by three units, $\Delta \text{L} = -3$, and show that despite stringent limits on the predicted $p \rightarrow e^{+}/\mu^{+} \overline{\nu}\overline{\nu}$ mode from the Super-Kamiokande experiment, the masses of the newly introduced elementary particles can be $\mathcal{O}$(TeV). We identify interesting unique signatures of baryon number violation of this model that can be probed both with currently available LHC data and with the upcoming High-Luminosity LHC. We also present a scenario for low-scale baryogenesis within the framework of this model.