Hadronic light-by-light scattering in the muon g−2: impact of proposed measurements of the π0 → γγ decay width and the γ*γ → π0 transition form factor with the KLOE-2 experiment
Regional Centre for Accelerator-based Particle Physics, Harish-Chandra Research Institute Chhatnag Road, Jhusi, Allahabad -211019, India
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We discuss, how planned measurements at KLOE-2 of the π0 → γ γ decay width and the γ*γ → π0 transition form factor can improve estimates for the numerically dominant pion-exchange contribution to hadronic light-by-light scattering in the muon g − 2 and what are the limitations related to the modelling of the off-shellness of the pion.
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