Top-antitop and Top-top Resonances in the Dilepton Channel at the CERN LHC

TL;DR

This paper presents a model-independent analysis of top-antitop and top-top resonances in the dilepton channel at the LHC, utilizing kinematic solutions to determine resonance properties and improve discovery potential.

Contribution

It introduces a method to reconstruct resonance mass and spin in the dilepton channel, enhancing detection capabilities for heavy and boosted top quark resonances.

Findings

Dilepton channel offers competitive resolution for top-antitop resonance detection.

Charge identification of leptons aids in top-top resonance discovery and spin determination.

Proposed solutions address challenges with heavy, highly boosted top quarks.

Abstract

We perform a model-independent study for top-antitop and top-top resonances in the dilepton channel at the Large Hadtron Collider. In this channel, we can solve the kinematic system to obtain the momenta of all particles including the two neutrinos, and hence the resonance mass and spin. For discovering top-antitop resonances, the dilepton channel is competitive to the semileptonic channel because of the good resolution of lepton momentum measurement and small standard model backgrounds. Moreover, the charges of the two leptons can be identified, which makes the dilepton channel advantageous for discovering top-top resonances and for distinguishing resonance spins. We discuss and provide resolutions for difficulties associated with heavy resonances and highly boosted top quarks.