Subleading Hadronic Vacuum Polarization Contributions to Muon g−2: μ+μ- → π0γ*
J. Korean Phy. Soc. 2018; 72: 221~227
Published online January 31, 2018 © 2018 The Korean Physical Society.


Department of Physics, Pusan National University, Busan 46241, Korea
Correspondence to: Du Hwan Kim
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 models. The model parameters are determined by fitting the experimental data for the e+e→π0γ* total cross section. It is our purpose to decide which model describes well the π0γ*γ* transition form factor by comparing with dispersive results.
PACS numbers: 14.60.Ef, 12.40.Vv, 13.40.Em
Keywords: Anomalous magnetic moment of muon, Hadronic vacuum polarization


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