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arXiv · 2401.08756

Higgs Width and Couplings at High Energy Muon Colliders with Forward Muon Detection

Peiran Li·Zhen Liu·Kun-Feng Lyu
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Abstract

We propose a novel method using the $ZZ$-fusion channel and forward muon detection at high-energy muon colliders to address the challenge of the Higgs coupling-width degeneracy. Our approach enables inclusive Higgs rate measurement to 0.75% at 10~TeV muon collider, breaking the coupling-width degeneracy. Results indicate the potential to refine Higgs coupling to sub-percent levels and estimate its total width within (-0.41%, +2.1%). Key insights include the effectiveness of forward muon tagging in signal-background separation despite broad recoil mass distribution due to muon energy reconstruction and beam energy spread. The study emphasizes the significance of muon rapidity coverage up to $|\eta (\mu)|<6$, enhancing measurement precision. Our findings highlight the unique capabilities of high-energy lepton colliders for model-independent Higgs coupling determination and lay the groundwork for future advancements in muon collider technology and Higgs physics research.

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Peiran Li, Zhen Liu, Kun-Feng Lyu. 2024-01-16. Higgs Width and Couplings at High Energy Muon Colliders with Forward Muon Detection. https://arxiv.org/abs/2401.08756

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