New Physics Searches with Higgs-photon associated production at the Higgs Factory

Understand

The Higgs factory is designed for precise measurement of Higgs characters and search for new physics.

• In this paper we propose that $e^+e^- \to \gamma h$ process could be a useful channel for new physics, which is normally expressed model independently by effective field theory.
• We calculate the cross section in both the Standard Model and effective field theory approach, and find that the new physics effects of $\gamma h$ have only two degrees of freedom, much fewer than the Higgsstrahlung process.
• This point could be used to reduce the degeneracies of Wilson coefficients.