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

2023/12/12 by Li, Cheng, Moortgat-Pick, Gudrid
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2312.07347

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^- → H Z → H μ⁺ μ^-, 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 Whizard simulation. By comparing the SM prediction with 2σ range of this asymmetry, we estimate the discovery limit of the CP-odd coupling in HZZ interaction.

Related

• Determination of CP-violating HZZ interaction with polarised beams at the ILC
• Testing CP Violation in the Higgs Sector at Muon Colliders
• Probing the CP of the Higgs at an electron-electron Collider
• Probing CP-violating Higgs-Gauge couplings with Higgsstrahlung at e^-e⁺ collider
• Role of angular observables in probing non-standard HZZ couplings at an electron-proton collider