Speaker
Gilberto Colangelo
(University of Berne)
Description
I will describe recent progress in approaching the calculation of the hadronic light-by-light contribution to (g-2)_mu with dispersive methods. I will first discuss general properties of the four-point function of the electromagnetic current in QCD, its Lorentz decomposition and dispersive representation. For what concerns the pseudoscalar pole contributions, I will give an overview of the determination of the pseudoscalar transition form factors. I will then consider the pion-loop contribution and discuss the recently proposed Mandelstam representation thereof.
