Würzburg 2018 – scientific programme
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T: Fachverband Teilchenphysik
T 73: Top-Quarks: Eigenschaften und Zerfälle III
T 73.8: Talk
Thursday, March 22, 2018, 18:20–18:35, Philo-HS1
Constraining systematic effects of top quark mass measurements from data — Hartmut Stadie, Christoph Garbers, Fred Stober, Johannes Lange, Nataliia Kovalchuk, Peter Schleper, and •Colin Frunder — Universität Hamburg, Institut für Experimentalphysik
The mass of the top quark is an important parameter of the standard model of particle physics. It precise measurement is of particular importance for consistency tests of the standard model.
The presented study is based on the CMS measurement of the top quark mass in the tt-semileptonic channel using 2016 data. The result for the top quark mass was mt = 172.25 ± 0.08(stat. + JSF) ± 0.62(syst.) GeV. The precision of this measurement is limited by systematic uncertainties, especially from b-jet modelling. Here additional observables are studied in order to constrain these model uncertainties. The impact of an extended mass measurement including this observable is estimated.