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arXiv · 2312.07347

Determination of CP-violating Higgs couplings with transversely-polarized beams at the ILC

Cheng Li·Gudrid Moortgat-Pick
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Abstract

We study possible CP-violation effects of the Higgs to $Z$-boson coupling at a future $e^+ e^-$ collider, e.g. the International Linear 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.

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Cheng Li, Gudrid Moortgat-Pick. 2023-12-12. Determination of CP-violating Higgs couplings with transversely-polarized beams at the ILC. https://arxiv.org/abs/2312.07347

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