Dortmund 2021 – scientific programme

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T: Fachverband Teilchenphysik

T 34: Extended Higgs models I

T 34.5: Talk

Tuesday, March 16, 2021, 17:00–17:15, Ti

Search for heavy Higgs bosons in the Z+tt final state — •Yannick Fischer, Ksenia de Leo, Johannes Haller, Roman Kogler, and Matthias Schröder — Institut für Experimentalphysik, Universität Hamburg

Since its discovery in 2012 the properties of the Higgs boson at 125 GeV have been subject of various analyses. Within the uncertainties all results suggest a standard model like behaviour. However, the observed boson might well be part of an extended Higgs sector, which is predicted in various scenarios of new physics beyond the standard model. Two Higgs Doublet Models (2HDM) provide a generic description of the phenomology arising in models with a second Higgs doublet. In this talk we will investigate the hypothetical decay chain A → ZH with H → tt, where H is a CP even and A a CP odd heavy Higgs boson. This channel has not yet been studied at the LHC. We will give a phenomenological overview of the expected branching ratios depending on the free parameters of the model. Furthermore, first studies of the properties of the signal events are presented.