Probing compressed mass spectra in electroweak supersymmetry with Recursive Jigsaw Reconstruction

TL;DR

This paper introduces the Recursive Jigsaw Reconstruction technique to improve searches for electroweak supersymmetric particles with compressed mass spectra at the LHC, aiming to fill gaps in current detection capabilities.

Contribution

The study applies a novel analysis method to enhance detection sensitivity for compressed chargino and neutralino spectra, potentially expanding the LHC's discovery reach.

Findings

Potential to probe unexplored parameter space for chargino-neutralino production.

Demonstrates feasibility of detecting compressed spectra with future LHC data.

Highlights the importance of advanced reconstruction techniques in supersymmetry searches.

Abstract

The lack of evidence for the production of colored supersymmetric particles at the LHC has increased interest in searches for superpartners of the electroweak SM gauge bosons, namely the neutralinos and charginos. These are challenging due to the weak nature of the production process, and the existing discovery reach has significant gaps in due to the difficulty of separating the supersymmetric signal from SM diboson events that produce similar final states and kinematics. We apply the Recursive Jigsaw Reconstruction technique to study final states enriched in charged leptons and missing transverse momentum, focusing on compressed topologies with direct production of charginos and neutralinos decaying to the lightest neutral supersymmetric particle through the emission of W and Z bosons. After presenting prototype analysis designs for future LHC runs, we demonstrate that its detectors have the potential to probe a significant amount of unexplored parameter space for chargino-neutralino associated production within the next few years, and show that the very challenging successful search for chargino pair production with compressed spectra might be possible by the end of the LHC lifetime.