Abstract
CP-odd Higgs couplings to bottom and charm quarks arise in many extensions of the standard model and are of potential interest for electroweak baryogenesis. These couplings induce a contribution to the electron EDM. The experimental limit on the latter then leads to a strong bound on the CP-odd Higgs couplings. We point out that this bound receives large QCD corrections, even though it arises from a leptonic observable. We calculate the contribution of CP-odd Higgs couplings to the bottom and charm quarks in renormalisation-group improved perturbation theory at next-to-leading order in the strong interaction, thereby reducing the uncertainty to a few percent.
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Acknowledgments
We thank Luca Merlo for a discussion that triggered this project. Z.P. acknowledges financial support from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program under grant agreement 833280 (FLAY), and from the Swiss National Science Foundation (SNF) under contract 200020-204428. J.B. acknowledges support in part by DoE grant DE-SC0011784.
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Brod, J., Polonsky, Z. & Stamou, E. A precise electron EDM constraint on CP-odd heavy-quark Yukawas. J. High Energ. Phys. 2024, 91 (2024). https://doi.org/10.1007/JHEP06(2024)091
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DOI: https://doi.org/10.1007/JHEP06(2024)091