Searches for TeV-scale particles at the LHC using jet shapes

TL;DR

This paper proposes using jet shape analysis to detect TeV-scale particles decaying into collimated jets at the LHC, improving identification over traditional methods.

Contribution

It introduces a jet shape-based approach for identifying hadronically decaying TeV particles, applicable to various cascade decay channels.

Findings

Jet shape techniques reduce QCD background.

Method effectively identifies heavy particle decays.

Applicable to multiple decay channels.

Abstract

New particles at the TeV scale can decay hadronically with strongly collimated jets, thus the standard reconstruction methods based on invariant-masses of well-separated jets can fail. We discuss how to identify such particles in pp collisions at the LHC using jet shapes which help to reduce the contribution of QCD-induced events. We focus on a rather generic example X to ttbar to hadrons, with X being a heavy particle, but the approach is well suited for reconstruction of other decay channels characterized by a cascade decay of known states.