Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 7: Top Quarks: Properties 1

T 7.8: Vortrag

Montag, 21. März 2022, 18:00–18:15, T-H20

Sensitivity studies for the measurement of the top-Yukawa coupling using four-top final states — Arnulf Quadt, Elizaveta Shabalina, and •Sreelakshmi Sindhu — II. Physikalisches Institut, Georg-August-Universität Göttingen

The top quark is the heaviest particle in the Standard Model and hence a precise measurement of its properties is key to identifying evidence for physics beyond the Standard Model. One such property is the top-Yukawa coupling, which describes the strength of the interaction between the top quark and the Higgs boson. The production of four top quarks can be mediated by the Higgs boson, making this process highly sensitive to the top-Yukawa coupling. Various kinematic variables from the decay of the four top process in the trilepton and same-sign dilepton channels are studied to identify the observables that are most sensitive to the top-Yukawa coupling. To get better sensitivity, the top quarks are reconstructed to directly probe the properties of the top quark. The neural network is studied to further improve the sensitivity of the four top quark production to the top-Yukawa coupling. In this talk, a summary of these sensitivity studies will be presented.