Techniques for improved heavy particle searches with jet substructure

TL;DR

This paper introduces a pruning technique in jet substructure analysis that enhances heavy particle detection at the LHC by improving mass resolution and reducing background noise.

Contribution

The paper proposes a novel pruning method for jet substructure that effectively suppresses soft radiation and background, improving heavy particle search sensitivity.

Findings

Enhanced mass resolution for heavy decays

Reduced QCD background in hadronic channels

Protojets removed are mainly from soft radiation

Abstract

We present a generic method for improving the effectiveness of heavy particle searches in hadronic channels at the Large Hadron Collider. By selectively removing, or pruning, protojets from the substructure provided by a k_T-style jet algorithm, we improve the mass resolution for heavy decays and decrease the QCD background. We show that the protojets removed are typical of soft radiation and underlying event contributions, and atypical of accurately reconstructed heavy particles.