Constraining capability of $Z\gamma h$ production at the ILC

Abstract

Higgs boson couplings with gauge bosons are probed through $e^{-}{e}^{+}\to Z\gamma h$ in an effective Lagrangian framework. For this study the beam polarization facility at the ILC along with the typical center-of-mass energy of 500 GeV is considered. The reach of the ILC with an integrated luminosity of 300 fb${}^{-1}$ in the determination of $CP$-conserving parameters is obtained. Sensitivity of the probe of each of these couplings in the presence of other couplings is investigated. The most influential coupling parameters are ${\bar{c}}_W=-{\bar{c}}_B$. Other parameters of significant effect are ${\bar{c}}_{HW}$ and ${\bar{c}}_{HB}$. A detailed study of the various kinematic distributions represents possibilities to disentangle the effect of some of these couplings.

Comments: 18 pages, 44 figures. arXiv admin note: substantial text overlap with arXiv:1501.03283