Revealing the jet substructure in a compressed spectrum

TL;DR

This paper introduces a new method for identifying soft particles from decaying particles in compressed spectra, enhancing the sensitivity of collider searches for new physics like supersymmetry.

Contribution

It proposes a novel tagging technique for soft final state particles in compressed spectra, demonstrated with a supersymmetric gluino search at the LHC.

Findings

Improved sensitivity in supersymmetric gluino searches.

Effective tagging of soft decay products in compressed spectra.

Potential to extend searches for new physics in challenging regions.

Abstract

The physics beyond the Standard Model with parameters of the compressed spectrum is well motivated both in a theory side and with phenomenological reasons, especially related to dark matter phenomenology. In this letter, we propose a method to tag soft final state particles from a decaying process of a new particle in this parameter space. By taking a supersymmetric gluino search as an example, we demonstrate how the Large Hadron Collider experimental collaborations can improve a sensitivity in these non-trivial search regions.