Precision Test of the Muon-Higgs Coupling at a High-energy Muon Collider

Understand

We explore the sensitivity of directly testing the muon-Higgs coupling at a high-energy muon collider.

• This is strongly motivated if there exists new physics that is not aligned with the Standard Model Yukawa interactions which are responsible for the fermion mass generation.
• We illustrate a few such examples for physics beyond the Standard Model.
• With the accidentally small value of the muon Yukawa coupling and its subtle role in the high-energy production of multiple (vector and Higgs) bosons, we show that it is possible to measure the muon-Higgs coupling to an accuracy of ten percent for a 10 TeV muon collider and a few percent for a 30 TeV machine by utilizing the three boson production, potentially sensitive to a new physics scale about $\Lambda \sim 30-100$ TeV.