Probing $HZ\gamma$ and $H\gamma\gamma$ Anomalous Couplings in the Process of $e^+e^- \to H\gamma$

Abstract

We propose to measure the $HZ\gamma$ and $H\gamma\gamma$ anomalous couplings in the process of $e^{+}e^{-}\rightarrow H\gamma$ with the sequential decay of $H\to b{\bar b}$. The discovery potential of observing the anomalous couplings are explored in details. Our study shows that the electron-positron collider has a great potential of testing the $HZ\gamma$ and $H\gamma\gamma$ couplings. Conservative bounds on the two anomalous couplings are also derived when no new physics signal were detected on top of the SM backgrounds.