SMuK 2023 – scientific programme

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T: Fachverband Teilchenphysik

T 109: Higgs, Di-Higgs III

T 109.2: Talk

Thursday, March 23, 2023, 16:05–16:20, HSZ/0105

Fake Estimation for the Search of the ttH(H → bb) Process in the Single Lepton Channel — •Alexander Froch, Andrea Knue, and Ksenia Solovieva — Albert-Ludwigs-Universität Freiburg

The coupling of the Higgs boson to the standard model (SM) fermions, called Yukawa coupling, is one of the most basic but also most interesting properties in Higgs physics. In the standard model the top quark, with the largest mass of all SM fermions, should have the largest Yukawa coupling to the Higgs boson of approximately 1. To measure this property, the production of a top-antitop quark pair in association with a Higgs boson is studied. Due to its small production rate at the LHC, the most dominant decay of the Higgs boson (into a pair of b-quarks) is used. One of the top quarks is required to decay hadronically while the other one decays leptonically. This results in a final state with at least 4 b-quarks, a lepton and 2 additional non-b-quarks. The selected sample of events are split into signal- and background-dominated sub-samples called regions. While the signal region is not strongly affected by fake leptons, in dedicated control regions where additional correction are derived, the fake lepton contribution is not negligible.
In this talk, the current status of the fake estimation of the analysis in the single lepton channel will be discussed.