SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 109: Higgs, Di-Higgs III

T 109.3: Vortrag

Donnerstag, 23. März 2023, 16:20–16:35, HSZ/0105

Measurement of the ttH(bb) Cross Section in Events with High Higgs Boson Momentum at the ATLAS Experiment — •Doga Elitez, Lucia Masetti, Eftychia Tzovara, Asma Hadef, Alexander Basan, and Jessica Höfner for the ATLAS collaboration — Johannes Gutenberg Universität Mainz

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 where one of the top quarks decays semi-leptonically and produces an electron or a muon. The so-called boosted topology targets events containing a Higgs boson produced at high transverse momentum, whose decay products are contained in a large radius jet. In this talk, methods to improve background rejection, event reconstruction, and increase the sensitivity above the current p_T range are presented.