Explaining a CMS $eejj$ Excess With $\mathcal{R}-$parity Violating Supersymmetry and Implications for Neutrinoless Double Beta Decay

TL;DR

This paper explains a CMS excess in the $eejj$ channel at 2 TeV using R-parity violating supersymmetry, proposing specific decay processes and discussing implications for neutrinoless double beta decay experiments.

Contribution

It introduces a SUSY-based explanation for the CMS $eejj$ excess involving resonant slepton production and explores its testability in neutrinoless double beta decay experiments.

Findings

CMS excess can be explained by R-parity violating SUSY with 2 TeV sleptons.

The proposed scenario predicts observable signals in upcoming neutrinoless double beta decay experiments.

GERDA Phase-II can probe a significant part of the model's parameter space.

Abstract

A recent CMS search for the right handed gauge boson $W_R$ reports an interesting deviation from the Standard Model. The search has been conducted in the $eejj$ channel and has shown a 2.8$\sigma$ excess around $m_{eejj} \sim 2$ TeV. In this work, we explain the reported CMS excess with R-parity violating supersymmetry (SUSY). We consider resonant selectron and sneutrino production, followed by the three body decays of the neutralino and chargino via an $\mathcal{R}-$parity violating coupling. We fit the excess for slepton masses around 2 TeV. The scenario can further be tested in neutrinoless double beta decay ($0\nu \beta \beta$) experiments. GERDA Phase-II will probe a significant portion of the good-fit parameter space.