Sensitivity to anomalous $ZZH$ couplings at the International Linear Collider

TL;DR

This paper assesses the potential of the International Linear Collider to measure and constrain anomalous $ZZH$ couplings, including CP-violating and CP-conserving structures, through detailed simulation of Higgs production channels.

Contribution

It provides a comprehensive analysis of the sensitivities to anomalous $ZZH$ couplings at the ILC using full detector simulation and various production channels.

Findings

Sensitivity to anomalous couplings at the ILC is achievable at specified energies.

Combined sensitivities provide realistic constraints on $ZZH$ couplings.

Analysis includes both CP-even and CP-odd coupling structures.

Abstract

This presentation gives the prospects of measuring the general Lorentz structures of $VVH$ ($V=Z$, $\gamma$ and $W$) couplings at the International Linear Collider (ILC). Sensitivities to Higgs CP-even and CP-odd structures are evaluated by using various Higgs production channels and employing measurements of kinematical distributions. The evaluation is performed based on full detector simulation of the International Large Detector (ILD) at center-of-mass energies $\sqrt{s}=$ 250 and 500 GeV. Combined sensitivities on the anomalous $ZZH$ couplings are provided for a realistic operating scenario of the ILC.