Karlsruhe 2024 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 47: Higgs 2 (ttH & tH production)

T 47.6: Vortrag

Dienstag, 5. März 2024, 17:15–17:30, Geb. 30.41: HS 2

Associated production of a Higgs boson and a single top quark from t-channel production (tHq) in channels with hadronically decaying tau leptons at ATLAS — •Florian Kirfel, Ian C. Brock, Oleh Kivernyk, and Christian Kirfel — Physikalisches Institut der Universtiät Bonn, Deutschland

A measurement of single top-quark production in association with a Higgs boson and a spectator light-quark (tHq) gives insight into the properties of not only the top quark but also the Higgs boson. The associated production is uniquely sensitive to the relative sign of the top quark-Higgs boson Yukawa coupling.

The decay of the Higgs boson into two tau leptons is covered by the presented analysis. Both cases in which one or two taus decay hadronically are considered and analysed based on the Run 2 LHC dataset from ATLAS.

The complete analysis workflow is covered, ranging from the treatment of tau lepton misidentification, over the application of a categorical neural network for signal isolation to a binned maximum likelihood estimation for the purpose of cross section estimation.

Keywords: tHq