Dortmund 2021 – wissenschaftliches Programm
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.