HADRONIC CONTRIBUTION TO LIGHT-BY-LIGHT SCATTERING IN G(MU)-2

We comment on the theoretical uncertainties involved in estimating the hadronic effects on the light-by-light scattering contribution to the anomalous magnetic moment of the muon, especially based on the analys is and results of Kinoshita, Nizic, and Okamoto. From the point of vie w of an effective field theory and chiral perturbation theory, we sugg est that the charged pion contribution may be better determined than h as been appreciated. However, the neutral pion contribution needs grea ter theoretical insight before its magnitude can be reliably estimated .