The Minimal Theory for R-parity Violation at the LHC

TL;DR

This paper presents a minimal gauge theory with spontaneous R-parity breaking based on B-L symmetry, analyzing its spectrum, constraints, and potential signals at the LHC, including distinctive multi-lepton and jet events.

Contribution

It introduces the simplest gauge framework for R-parity violation, detailing its spectrum, constraints, and LHC signatures, advancing understanding of lepton number violation.

Findings

Potential LHC signals with four charged leptons and jets identified

The theory's spectrum and neutrino mass constraints thoroughly analyzed

Distinctive multi-lepton channels can test R-parity violation at the LHC

Abstract

We investigate the simplest gauge theory for spontaneous R-parity breaking and its testability at the LHC. This theory based on a local B-L gauge symmetry can be considered as the simplest framework for understanding the origin of the R-parity violating interactions, giving rise to potential lepton number violating signals and suppressed baryon number violating operators. The full spectrum of the theory and the constraints coming from neutrino masses are analyzed in great detail. We discuss the proton decay issue and the possible dark matter candidates. In order to assess the testability of the theory we study the properties of the new gauge boson, the neutralino decays and the main production channels for the charged sleptons at the LHC. We find that the channels with four charged leptons, three of them with the same sign, and four jets give us the most striking signals for the testability of lepton number violation at the LHC.