Resonant Slepton Production Yields CMS $eejj$ and $ejj$ Missing $p_T$ Excesses

TL;DR

This paper proposes a supersymmetric model involving resonant slepton production with R-parity violation to simultaneously explain observed CMS excesses in $eejj$ and $ejj$ channels, and discusses its testability with future experiments.

Contribution

It introduces a novel SUSY-based explanation for CMS excesses using resonant slepton production and analyzes its compatibility with other experimental constraints.

Findings

Resonant slepton production can explain CMS $eejj$ and $ejj$ excesses.

Model remains compatible with other collider constraints.

Future GERDA phase-II will probe significant parts of the model's parameter space.

Abstract

Recent CMS searches for di-leptoquark production report local excesses of 2.4$\sigma$ in a $eejj$ channel and 2.6$\sigma$ in a $ejj$ missing $p_T$ channel. Here, we simultaneously explain both excesses with resonant slepton production in ${\mathcal R}-$parity violating supersymmetry (SUSY). We consider resonant slepton production, which decays to a lepton and a chargino/neutralino, followed by three-body decays of the neutralino/chargino via an $\mathcal{R}-$parity violating coupling. There are regions of parameter space which are also compatible at the 95% confidence level (CL) with a 2.8$\sigma$ $eejj$ excess in a recent CMS $W_R$ search, while being compatible with other direct search constraints. Phase-II of the GERDA neutrinoless double beta decay ($0\nu\beta\beta$) experiment will probe a sizeable portion of the good-fit region.