Heidelberg 2022 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 35: Higgs Boson: Associated Production 1
T 35.3: Vortrag
Dienstag, 22. März 2022, 16:45–17:00, T-H20
Investigation of ttH(bb) Events with Very High Higgs Boson Momentum at ATLAS Detector — •Doga Elitez, Lucia Masetti, Eftychia Tzovara, Asma Hadef, and Alexander Basan — Johannes Gutenberg-Universität Mainz, Mainz, Deutschland
The coupling of the Higgs boson to the top quark is very sensitive to effects of the physics beyond the Standard Model (BSM) and the most favorable production mode for direct measurement of the top Yukawa coupling is the Higgs production in association with a pair of top quarks (ttH). The decay to two bottom quarks (H → bb) has the largest branching fraction of about 58%. This analysis aims at events in which one of the top quarks decays semi-leptonically and produces an electron or a muon plus several jets. The so-called ultra boosted topology targets events containing a Higgs boson produced at very high transverse momentum, which is contained in a single small-R jet. This topology is not included in the current high pT (boosted) Higgs boson selection and requires a dedicated analysis. In this talk, methods to improve background rejection and event reconstruction to increase the sensitivity above the current pT range are presented, along with the challenges of combining the different channels.