Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 21: BSM Higgs 1 (extended Higgs sectors)

T 21.6: Talk

Monday, March 4, 2024, 17:15–17:30, Geb. 30.41: HS 3

Search for heavy Higgs bosons in the ttZ final state at CMS — Matteo Bonanomi, Yannick Fischer, Johannes Haller, •Daniel Hundhausen, Christopher Matthies, and Matthias Schröder — Universität Hamburg

All measurements of the properties of the Higgs boson at 125 GeV are compatible with a standard model-like behaviour. However, the observed resonance 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 phenomenology arising in models with a second Higgs doublet. In this talk, we will present a search for a hypothetical CP-odd heavy Higgs boson A decaying into a CP-even heavy Higgs boson H and a Z boson, with the H boson decaying further into a top quark-antiquark pair (tt). This decay channel is particularly relevant in the high mass and low tan(β) regime. We will present the strategy and status of the analysis of data collected with the CMS experiment at a centre-of-mass energy of 13 TeV, targeting the fully hadronic tt decay.

Keywords: Baryogenesis; 2HDM; Extended Higgs Sector; BSM; CMS