Papers › Top Yukawa Coupling Determination at High Energy Muon Collider

Top Yukawa Coupling Determination at High Energy Muon Collider

11 Aug 2023arXiv:2308.06323links table onlyarchive 2025-07-28

Zhen Liu, Kun-Feng Lyu, Ishmam Mahbub, Lian-Tao Wang

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The Top Yukawa coupling profoundly influences several core mysteries linked to the electroweak scale and the Higgs boson. We study the feasibility of measuring the Top Yukawa coupling at high-energy muon colliders by examining the high-energy dynamics of the weak boson fusion to top quark pair processes. A deviation of the Top Yukawa coupling from the Standard Model would lead modified V V →tt̅ process, violating unitarity at high energy. Our analysis reveals that utilizing a muon collider with a center-of-mass energy of 10 TeV and an integrated luminosity of 10 ab⁻¹ allows us to investigate the Top Yukawa coupling with a precision surpassing 1.5\%, more than one order of magnitude better than the precision from tt̅ h channel at muon colliders. This precision represents a notable enhancement compared to the anticipated sensitivities of the High-Luminosity LHC (3.4\%) and those at muon colliders derived from the tt̅ H process.

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