Dortmund 2021 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 29: Top quark decay and top properties I
T 29.4: Vortrag
Dienstag, 16. März 2021, 16:50–17:05, Td
A nuisance parameter fit for the top quark mass measurement — •Christoph Garbers, Peter Schleper, and 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 with multiple additional observables will be presented.