Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 32: QCD (Exp.) 1

T 32.7: Vortrag

Dienstag, 22. März 2022, 17:45–18:00, T-H17

Jet Energy Calibration for Ultra Legacy Data with Z+Jet Events at CMS — •Robin Hofsaess, Daniel Savoiu, Florian von Cube, and Maximilian Horzela — KIT (ETP), Karlsruhe, Germany

High precision analyses in modern particle physics experiments rely on the measurement of jets coming from the particle interactions. Since jets comprise many different particles and the observation of such complex physics objects is affected by detector- and reconstruction-specific effects, sophisticated methods are necessary to get a reliable and accurate calibration of the jet energy.

At CMS, a factorized approach -- collectively known as the jet energy calibration -- is employed for correcting shifts in the jet energy. An important step in this process exploits events where a jet is balanced against a well-measured reference object such as the Z boson. By comparing the transverse momenta of the two objects, it is possible to determine the absolute jet energy scale, accounting for any residual differences between simulation and data.

In this talk, the methods for the determination of the jet energy scale will be described and the latest results for the legacy calibration of Run II will be presented.