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- W3104180623 abstract "One of the open issues in evaluations of the contribution from hadronic light-by-light scattering to the anomalous magnetic moment of the muon $(g-2)_mu$ concerns the role of heavier scalar, axial-vector, and tensor-meson intermediate states. The coupling of axial vectors to virtual photons is suppressed for small virtualities by the Landau-Yang theorem, but otherwise there are few rigorous constraints on the corresponding form factors. In this paper, we first derive the Lorentz decomposition of the two-photon matrix elements into scalar functions following the general recipe by Bardeen, Tung, and Tarrach. Based on this decomposition, we then calculate the asymptotic behavior of the meson transition form factors from a light-cone expansion in analogy to the asymptotic limits for the pseudoscalar transition form factor derived by Brodsky and Lepage. Finally, we compare our results to existing data as well as previous models employed in the literature." @default.
- W3104180623 created "2020-11-23" @default.
- W3104180623 creator A5004867878 @default.
- W3104180623 creator A5057754049 @default.
- W3104180623 date "2020-05-01" @default.
- W3104180623 modified "2023-10-02" @default.
- W3104180623 title "Asymptotic behavior of meson transition form factors" @default.
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- W3104180623 doi "https://doi.org/10.1007/jhep05(2020)159" @default.
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