Karlsruhe 2024 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 71: Higgs 3 (coupling to b and c quarks)

T 71.4: Vortrag

Mittwoch, 6. März 2024, 16:45–17:00, Geb. 30.41: HS 2

Transfomer based Search for the Gluon-Fusion induced ZH Production in the H→ bb, Z→ e⁺e⁻/µ⁺µ⁻ Final States with the CMS Experiment — •Niclas Eich, Svenja Diekmann, and Martin Erdmann — RWTH Aachen University

The gluon fusion induced ZH production is yet to be measured. Its estimated cross section in the Standard Model is relatively small with only 0.12 pb, making a search difficult over the vast number of background events. We present the blinded results of our analysis in the H→ bb, Z→ e⁺e⁻/µ⁺µ⁻ final states, at the CMS experiment for the Run 2 data taking period.

In this, we leverage Machine Learning methods, employing a transformer-based process classifier to differentiate between signal and various background processes. Subsequently, we enhance the analysis sensitivity by subjecting the classifier’s predictions to K-Means clustering. This two-step approach allows us to create bins for a statistical evaluation in a multi-dimensional space. The final results are presented as sensitivity analysis, including systematic and statistical uncertainties.

Keywords: VH; CMS; Machine Learning; gluon-fusion; Transformer