Jet Reconstruction with charged tracks only in CMS

TL;DR

This paper evaluates the effectiveness of charged track-based jet reconstruction in CMS across various event types, comparing it to calorimeter-based methods and analyzing performance under pile-up conditions.

Contribution

It introduces a detailed assessment of charged track-only jet algorithms in CMS, including performance metrics and pile-up robustness, which is a novel comprehensive study.

Findings

Charged track jets have comparable energy response to calorimeter jets.

Performance varies with jet algorithms and event types.

Pile-up effects are manageable with track-based reconstruction.

Abstract

The performance of jet finding using only charged tracks in CMS has been investigated. Different jet algorithms have been applied to QCD di-jet events, to hadronic tt multi-jet events and on Z+jets events. Results using jets made with tracks only or calorimeter towers are compared for energy response, angular resolution and jet matching to the leading partons. The jet reconstruction performance in the presence of pile-up interactions is presented for the Z+jets sample.