Dortmund 2021 – scientific programme

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T: Fachverband Teilchenphysik

T 27: QCD I

T 27.6: Talk

Tuesday, March 16, 2021, 17:15–17:30, Tb

Jet Mass Calibration — •Steffen Albrecht, Andreas Hinzmann, Dennis Schwarz, and Roman Kogler — Universität Hamburg

In this talk, a technique for calibrating the mass of (fat) jets will be presented. In the analysis of hadronic final states, the resolution and the scale of the jet mass can be an important source for the systematic uncertainties. Therefore an improvement of its measurement will benefit many of these analyses.

Using scales of jet constituents of different categories (e.g. charged hadronic, neutral hadronic) as nuisance parameters in a template fit of the jet mass in several regions to data, one can learn about their influence on the jet mass shape and normalisation. The presented analysis takes processes with W+jets as well as hadronic tt systems in the final states into account. In addition, only events are considered in which the bosons have a large transverse momentum and thus produce strongly collimated decay products which are reconstructed as single fat jets.