Dortmund 2021 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 29: Top quark decay and top properties I

T 29.1: Gruppenbericht

Dienstag, 16. März 2021, 16:00–16:20, Td

Top quark mass measurements at the University of Hamburg with CMS — Christoph Garbers, Johannes Haller, Roman Kogler, Johannes Lange, Alexander Paasch, Peter Schleper, •Dennis Schwarz, and Hartmut Stadie — Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg

Being the heaviest particle that we know of, the top quark is of special interest in the Standard Model of particle physics. Its mass plays a crucial role in quantum loop corrections to the Higgs boson mass, and precise measurements of this fundamental parameter provide important tests of the theory. Ambiguities in the top quark mass scheme arise from the use of non-perturbative parton shower models in direct measurements that could be resolved by new analysis strategies.

In this talk, efforts of the CMS group of the University of Hamburg in the area of top quark mass measurements are presented, which include the most precise single direct measurement to date and an alternative approach using the jet mass of boosted hadronic top quark decays.