Dortmund 2021 – scientific programme
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T: Fachverband Teilchenphysik
T 9: Associated Higgs production and Higgs quantum numbers I
T 9.6: Talk
Monday, March 15, 2021, 17:15–17:30, Ti
Investigation of ttH(bb) Events with Very High Higgs Boson Momentum at ATLAS Detector — Lucia Masetti, Eftychia Tzovara, Alexander Basan, Andriani Panagi, Asma Hadef, and •Doga Elitez — Johannes Gutenberg Universität Mainz, Institut für Physik, Mainz, Germany
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. The challenges in terms of background rejection and the potential to increase the sensitivity above the current pT range are presented in this talk.