Lepton Number Violation from Colored States at the LHC

TL;DR

This paper explores the potential for detecting lepton number violation at the LHC through colored seesaw models involving scalar and Majorana fermionic color-octets, which could produce observable same-sign dilepton signals up to 1 TeV.

Contribution

It introduces a novel analysis of lepton number violation signals from colored states at the LHC, focusing on production and decay channels involving color-octets in the colored seesaw scenario.

Findings

Favorable production rates of colored states at the LHC due to QCD interactions.

Detection of same-sign dilepton signals for fermionic octets up to 1 TeV.

Potential to distinguish neutrino spectra through decay patterns.

Abstract

The possibility to search for lepton number violating signals at the Large Hadron Collider (LHC) in the colored seesaw scenario is investigated. In this context the fields that generate neutrino masses at the one-loop level are scalar and Majorana fermionic color-octets of SU(3). Due to the QCD strong interaction these states may be produced at the LHC with a favorable rate. We study the production mechanisms and decays relevant to search for lepton number violation signals in the channels with same-sign dileptons. In the simplest case when the two fermionic color-octets are degenerate in mass, one could use their decays to distinguish between the neutrino spectra. We find that for fermionic octets with mass up to about 1 TeV the number of same-sign dilepton events is larger than the standard model background indicating a promising signal for new physics.