Discovering baryon-number violating neutralino decays at the LHC

TL;DR

This paper proposes a novel method to identify baryon-number violating neutralino decays at the LHC by analyzing jet substructure, overcoming previous background challenges and enabling potential direct observation.

Contribution

It introduces a new jet substructure technique tailored for detecting neutralino decays into three quarks in baryonic R-parity violating models.

Findings

High-significance detection possible with the proposed method

Jet substructure features distinguish signal from QCD background

First demonstration of observing such decays at the LHC

Abstract

Recently there has been much interest in the use of single-jet mass and jet substructure to identify boosted particles decaying hadronically at the LHC. We develop these ideas to address the challenging case of a neutralino decaying to three quarks in models with baryonic violation of R-parity. These decays have previously been found to be swamped by QCD backgrounds. We demonstrate for the first time that such a decay might be observed directly at the LHC with high significance, by exploiting characteristics of the scales at which its composite jet breaks up into subjets.