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T: Fachverband Teilchenphysik
T 28: Top quarks: mass and jets
T 28.3: Vortrag
Dienstag, 31. März 2020, 17:30–17:45, H-HS XI
A nuisance parameter fit for the top quark mass measurement — •Christoph Garbers, Johannes Lange, Peter Schleper, David Spataro und Hartmut Stadie — Universität Hamburg, Hamburg, Germany
The top quark is the heaviest known particle in the standard model.
It plays a crucial role in consistency checks of the Standard Model and in search for new physics.
In the tt to lepton+jets channel a top quark mass of 172.25±0.63 GeV was measured. With the 35.9fb−1 data recorded by CMS in 2016 this measurement was limited by systematic uncertainties, especially the correction of jet energies and the description of color reconnection in simulation.
A method to improve this measurement by inserting systematic uncertainties as nuisance parameters into a profiled likelihood fit will be presented.