Measuring hhWW Coupling at Lepton Colliders

2023/12/12 by Qing-Hong Cao, Cao, Qing-Hong, Kun Cheng +5
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Particle Detector Development and Performance #Particle physics theoretical and experimental studies #Superconducting and THz Device Technology

paper · pdf · doi:10.48550/arxiv.2312.07272

openalex publication_date 2023/12/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The quartic Higgs-gauge-boson coupling g_hhWW is sensitive to the electroweak symmetry breaking mechanism, however, it is challenging to be measured at the large hadron collider. We show that the coupling can be well probed at future lepton colliders through di-Higgs boson production via the vector boson fusion channel. We perform a detailed simulation of ℓ⁺ℓ^-→ ννhh→ 4b + \not E_T with parton showering effects at e⁺e^-, μ⁺μ^- and e^-μ⁺ colliders. We find that the regions of g_hhWW/g_hhWW^{\rm SM}<0.86 and g_hhWW/g_hhWW^{\rm SM}>1.32 can be discovered at the 5σ confidence level at the 10 TeV μ⁺ μ^- collider with an integrated luminosity of 3 ab^-1.

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