Speaker
Gilberto Colangelo
(Bern University)
Description
I will describe our recent dispersive analysis of the hadronic light-by-light tensor. We relate the latter to the helicity amplitudes of the process $\gamma^* \gamma^* \to \pi \pi$ and provide a formula for the calculation of the hadronic light-by-light contribution to $(g-2)_\mu$.
Author
Gilberto Colangelo
(Bern University)
