Hadronic light-by-light scattering and the muon’s (g-2)

In my talk, I will present our recent dispersive analysis of the gamma gamma* -> pipi, pieta processes from the threshold up to 1.4 GeV in the two photon invariant mass. These amplitudes serve as important input to constrain the hadronic piece of light-by-light scattering contribution to (g-2) and support the current experimental program at BESIII. As well, I will present an application of the light-by-light scattering sum rules to the gamma gamma*-production of mesons in light of the new data by the Belle Collaboration on the transition form factors.