PoS - Proceedings of Science
Volume 449 - The European Physical Society Conference on High Energy Physics (EPS-HEP2023) - T09 Higgs Physics
Determination of CP-violating Higgs couplings with transversely-polarized beams at the ILC
C. Li* and G. Moortgat-Pick
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Pre-published on: February 23, 2024
Published on: March 21, 2024
We study possible CP-violation effect of the Higgs to $Z$ boson coupling
at the future $e^+ e^-$ collider (ILC). We find that the azimuthal angular distribution of the muon pair, produced by $e^+ e^- \rightarrow H Z \rightarrow H \mu^+ \mu^-$, can be sensitive to such a CP-violation effect when we apply initial transversely polarized beams. Based on this angular distribution, we construct a CP sensitive asymmetry, and obtain this asymmetry by \texttt{Whizard} simulation. By comparing the SM prediction with 2$\sigma$ range of this asymmetry, we estimate the discovery limit of the CP-odd coupling in $HZZ$ interaction.
DOI: https://doi.org/10.22323/1.449.0405
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