Bonn 2020 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 58: Higgs: associated production
T 58.7: Vortrag
Mittwoch, 1. April 2020, 18:00–18:15, H-1.002
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, Bonn, Germany
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 the sign of CF/CV which results in the cross-section changing by almost one order of magnitude, as the pair production channel (ttH) is not sensitive to it.
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. Because of this a promising channel for the tH search is the multilepton channel where the Higgs decays into two τ. 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.