Abstract
We study the 2HDM contribution to the muon anomalous magnetic moment a μ and present the complete two-loop result, particularly for the bosonic contribution. We focus on the Aligned 2HDM, which has general Yukawa couplings and contains the type I, II, X, Y models as special cases. The result is expressed with physical parameters: three Higgs boson masses, Yukawa couplings, two mixing angles, and one quartic potential parameter. We show that the result can be split into several parts, each of which has a simple parameter dependence, and we document their general behavior. Taking into account constraints on parameters, we find that the full 2HDM contribution to a μ can accommodate the current experimental value, and the complete two-loop bosonic contribution can amount to (2⋯4) × 10−10, more than the future experimental uncertainty.
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29 October 2021
An Erratum to this paper has been published: https://doi.org/10.1007/JHEP10(2021)242
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Cherchiglia, A., Kneschke, P., Stöckinger, D. et al. The muon magnetic moment in the 2HDM: complete two-loop result. J. High Energ. Phys. 2017, 7 (2017). https://doi.org/10.1007/JHEP01(2017)007
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DOI: https://doi.org/10.1007/JHEP01(2017)007