Dortmund 2021 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 9: Associated Higgs production and Higgs quantum numbers I

T 9.5: Vortrag

Montag, 15. März 2021, 17:00–17:15, Ti

Associated production of a single top quark and a Higgs boson in the H→bb decay channel at the CMS experiment — Thorsten Chwalek, Nils Faltermann, •Marco Link, and Thomas Müller — Institut für Experimentelle Teilchenphysik (ETP), Karlsruher Institut für Technologie (KIT)

The associated production of a single top quark and a Higgs boson (tH) is a still undiscovered Standard Model (SM) process with a production cross section of about one tenth of the production cross section of the associated production of a top quark pair and a Higgs boson (ttH). In contrast to ttH production, tH production is through interference also sensitive to the sign of the top-Higgs coupling.

This presentation focuses on the reconstruction of tHq, tHW, tt and ttH events with a single lepton final state using boosted decision trees (BDT) and the results obtained from the combination of three channels (fully hadronic, single lepton and dilepton) with 137.2 fb⁻¹ of proton-proton collision data recorded at √s=13 TeV by the CMS experiment from 2016 to 2018. These results include a limit on the SM tH production and measurements of the top-Higgs coupling, for a SM Higgs boson and for a mixture with a non-SM CP-odd Higgs boson.