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Subleading hadronic vacuum polarization contributions to muon g − 2: μ+μ− → γ* → π0γ*

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Abstract

We consider the subleading contributions of the hadronic vacuum polarization, involving the π0γ*γ* transition form factor, to the muon anomalous magnetic moment g − 2. Various models for the form factor, based on hadronic ansatzes and holographic principles, are considered: They are the Wess-Zumino-Witten, vector meson dominance, lowest meson dominance (one and two vector resonances), and anti-de Sitter/quantum chromodynamics (AdS/QCD) models. The model parameters are determined by fitting the experimental data for the e+e−→ π0γ total cross section. We report the following numerical result for the corrections to the muon g − 2: the resulting values of two vector resonances model are one order-of-magntitude smaller than the one obtained from the dispersion relation.

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Authors and Affiliations

  1. Department of Physics, Pusan National University, Busan, 46241, Korea

    Deog Ki Hong, Du Hwan Kim & Jong-Wan Lee

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  1. Deog Ki Hong
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  2. Du Hwan Kim
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  3. Jong-Wan Lee
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Correspondence to Du Hwan Kim.

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Hong, D.K., Kim, D.H. & Lee, JW. Subleading hadronic vacuum polarization contributions to muon g − 2: μ+μ− → γ* → π0γ*. Journal of the Korean Physical Society 72, 221–227 (2018). https://doi.org/10.3938/jkps.72.221

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