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T: Fachverband Teilchenphysik

T 58: Higgs: associated production

T 58.10: Vortrag

Mittwoch, 1. April 2020, 18:45–19:00, H-1.002

Measurement of top-quark-antiquark pair production in association with a Higgs boson at CMS — Ulrich Husemann, Philip Keicher, Matthias Schröder, Jan van der Linden, and •Sebastian Wieland — Institut für Experimentelle Teilchenphysik (ETP), Karlsruher Institut für Technologie (KIT)

The top quark-antiquark pair production in association with a Higgs boson offers a model-independent measurement of the top-Higgs Yukawa coupling. This is of great interest in order to test precisely the couplings of the Higgs boson to fermions predicted by the standard model.

In this talk a multivariate analysis in the semileptonic decay channel of the top quark-antiquark pair and the decay of the Higgs boson into a bottom quark-antiquark pair is presented.

A major challenge to this analysis are the backgrounds. Particularly, top quark-antiquark pair production with additional b quarks provide a final state almost indistinguishable from the signal process. Since this process is also theoretically challenging, different ways of modelling this background will be compared. The focus will be on the comparison of observables sensitive to differences in the background modelling.