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Dortmund 2021 – scientific programme

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T: Fachverband Teilchenphysik

T 9: Associated Higgs production and Higgs quantum numbers I

T 9.3: Talk

Monday, March 15, 2021, 16:30–16:45, Ti

Towards a measurement of single top quark production in association with a Higgs boson (tH) in the ditau channel at ATLAS — •Tanja Holm and Ian C. Brock — Physikalisches Institut Universität Bonn

Single top quark production in association with a Higgs boson sometimes is referred to as the ‘golden channel’ of single top-quark processes due to the opportunities it gives in studying the couplings of the Higgs boson. Especially interesting is CF/CV which results in the cross-section changing by almost one order of magnitude.
The production of a top quark in association with a Z boson has been discovered at ATLAS and CMS in the trilepton channel, considering the top quark and the Z boson to decay leptonically. Hence a promising channel for the tH search is the multilepton channel where the Higgs decays into two τ leptons. Given that each τ has a 64.6% probability to decay hadronically we search for events containing two hadronic τ decays and events containing one hadronic τ decay.
This talk will discuss the search for the tH production in the hadronic τ channels in ATLAS using the Run 2 data of the LHC.

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