Speaker
Gilberto Colangelo
Summary
I will describe recent progress in approaching the calculation of the
hadronic light-by-light contribution to
methods. I will discuss general properties of the four-point function
of the electromagnetic current in QCD, its Lorentz decomposition
and dispersive representation. New results concerning the contribution
of D and higher waves and some very preliminary numerical results
will be presented. I will conclude with an outlook for this approach
to the calculation of hadronic light-by-light.
