Jet Energy Scale and Resolution Measurements in CMS

TL;DR

This paper reports on the measurement of jet energy scale and resolution in CMS using 13 TeV proton-proton collision data from 2016-2018, addressing challenges like high pileup and detector variations.

Contribution

It introduces in-situ methods for precise JES and JER measurements in CMS Run 2 data, combining experimental data and simulations with advanced techniques.

Findings

Precise JES and JER measurements achieved for CMS Run 2 data.

In-situ methods effectively account for pileup and detector variations.

Results improve the accuracy of physics analyses at CMS.

Abstract

Measurements of jet energy scale (JES) and resolution (JER) are presented, based on the legacy reconstruction of 13 TeV proton-proton collision data collected by the CMS experiment during the LHC Run 2 period from 2016-2018. Precision measurement of JES is of the utmost importance for the vast majority of physics measurements and searches at CMS. The high pileup, a harsh radiation environment, and time-dependent variations in detector response and calibration, all make precision JES measurement a challenging task. We present in-situ derivations of JES and JER based on CMS Run 2 data, as well as on simulated samples using various advanced techniques.