Identifying boosted hadronically decaying top quark using jet substructure in its center-of-mass frame

TL;DR

This paper presents a jet substructure technique in the jet's center-of-mass frame to effectively identify boosted hadronic top quarks, significantly reducing background noise even in high pileup environments.

Contribution

The study introduces a novel jet substructure method in the jet's center-of-mass frame for boosted top quark identification, improving background rejection and efficiency.

Findings

High top quark identification efficiency maintained in high pileup conditions.

Significant reduction in QCD jet background achieved.

Method applicable to heavy resonance searches involving top quarks.

Abstract

In this paper we study the identification of boosted hadronically decaying top quarks using jet substructure in the center-of-mass frame of the jet. We demonstrate that the method can greatly reduce the QCD jet background while maintaining high identification efficiency of the boosted top quark even in a very high pileup condition. Applications to searches for heavy resonances that decay to a $t\bar{t}$ final state are also discussed.