Speaker
Xu Feng
(Peking University)
Description
The conventional method to calculate $\pi\to\gamma\gamma$ decay width is to study the momentum dependence of the pion form factor $F_{\pi\gamma\gamma}(p^2,q^2)$ with $p$, $q$ the momenta of two photons and perform an extrapolation to the on-shell limit, $p^2,q^2=0$. In alternative, we propose a novel, simple approach to determine the decay width directly from the hadronic function in Euclidean coordinate space.
Authors
Norman Christ
(Columbia University)
Xu Feng
(Peking University)
Luchang Jin
Cheng Tu
Yidi Zhao
(Columbia University)
