19–23 May 2025
CERN
Europe/Zurich timezone

Constraining the Higgs trilinear self-coupling from off-shell production using neural simulation-based inference

Not scheduled
20m
61/1-201 - Pas perdus - Not a meeting room - (CERN)

61/1-201 - Pas perdus - Not a meeting room -

CERN

10
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Poster 2 ML for analysis: Event classification, statistical analysis and inference, anomaly detection Poster Session

Speaker

Tae Hyoun Park (Max Planck Society (DE))

Description

Experimental verification of the Higgs trilinear self-coupling is one of the next major challenges of particle physics. While prospects from proton-proton collisions have centred around measuring the on-shell single- and di-Higgs production processes, the off-shell Higgs production process has also been suggested as a complementary channel to resolve the degeneracy in Higgs couplings. We employ neural simulation-based inference (NSBI) to evaluate an expansion of the likelihood ratio that fully describes the Higgs signal under effective field theory modifications to the self-coupling, relevant backgrounds, and possible quantum interference effects between them in the $pp\to ZZ$ process. We demonstrate that NSBI approaches the best possible sensitivity and report the expected constraint at the High-Luminosity Large Hadron Collider.

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Author

Tae Hyoun Park (Max Planck Society (DE))

Co-author

Aishik Ghosh (University of California Irvine (US))

Presentation materials

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