Physics Objects in CMS Run 3

TL;DR

This paper reviews the performance and calibration of physics objects in CMS Run 3, highlighting the use of advanced algorithms like transformers to maintain analysis accuracy under high pileup conditions.

Contribution

It introduces the deployment of transformer-based algorithms for jet and resonance identification in the challenging environment of Run 3.

Findings

Algorithms show resilience against high pileup conditions.

Transformer-based methods improve heavy-flavor jet identification.

Calibration procedures ensure accurate physics object measurements.

Abstract

In these proceedings we review the physics objects used by the CMS experiment during LHC Run 3 at 13.6 TeV, including charged leptons, photons, jets, and missing transverse momentum. Their performance and calibration is critical for physics analysis. In particular, the algorithms need to be resilient against the high pileup conditions in Run 3 collisions. Furthermore, transformer-based algorithms are deployed for the identification of heavy-flavor jets and boosted resonances.