# Exotic coloured fermions and lepton number violation at the LHC

## TL;DR

This paper explores a model with exotic coloured fermions and scalar leptoquarks that can produce detectable lepton number violation signals at the LHC, potentially revealing new physics related to neutrino masses.

## Contribution

It introduces a specific extension of the standard model with coloured octet fermions and scalar leptoquarks, analyzing its LHC signatures and discovery potential.

## Key findings

- LHC can probe fermion masses up to 2.6-2.7 TeV
- Model generates neutrino masses at 2-loop order
- Detailed Monte Carlo simulation of signals and backgrounds

## Abstract

Majorana neutrino mass models with a scale of lepton number violation (LNV) of order TeV potentially lead to signals at the LHC. Here, we consider an extension of the standard model with a coloured octet fermion and a scalar leptoquark. This model generates neutrino masses at 2-loop order. We make a detailed MonteCarlo study of the LNV signal at the LHC in this model, including a simulation of standard model backgrounds. Our forecast predicts that the LHC with 300/fb should be able to probe this model up to colour octet fermion masses in the range of (2.6-2.7) TeV, depending on the lepton flavour of the final state.