Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 48: BSM Higgs 2 (extended Higgs sectors)

T 48.4: Talk

Tuesday, March 5, 2024, 16:45–17:00, Geb. 30.41: HS 3

Search for a BSM resonance decaying into two SM Higgs bosons in the bbWW final state with the CMS detector. — Matteo Bonanomi, Mathis Frahm, Johannes Haller, •Viacheslav Kosterin, Lara Markus, Janek Moels, Alexander Paasch, and Matthias Schroeder — Institut für Experimentalphysik, Universität Hamburg

The study of the pair production of Standard Model (SM) Higgs bosons (HH) allows a direct determination of the trilinear Higgs coupling and enhances our understanding of the Higgs potential. In addition, theories beyond the SM predict the existence of heavy particles that manifest as a resonance in the decay of two SM Higgs bosons.

In this talk we present the search for such heavy particles in final states containing two b quarks and two W bosons, where one of the W bosons decays into a pair of light jets and the other decays into a charged lepton and a neutrino.

We present the analysis strategy and the first results obtained using multiclass classifiers based on deep neural networks to address the main challenge of the analysis, that is the small fraction of signal events compared to the large amount of background.

We present expected results based on the data recorded at the CMS experiment during Run 2 and the preparation of the corresponding Run 3 analysis.

Keywords: Resonant Analysis; Higgs Potential; Di-Higgs; Machine Learning