Speaker
Luchang Jin
Description
We report a first principle lattice calculation of the pion electric polarizablity $\alpha_\pi$. First, we derive the master formula, which relate the pion polarizabilies with the position space hadronic Compton tensor, $\langle \pi | J_\mu(x) J_\nu(0) | \pi \rangle$. Then, the hadronic tensor is calculated using Domain Wall fermions directly at physical pion mass. The gauge ensembles are generated by the RBC-UKQCD collaborations. The finite volume effects are exponentially suppressed by the spatial extent of the lattice. We have studied the finite volume and also the discretization effects with different lattice volumes and lattice spacings.
Authors
Heng-Tong Ding
(Central China Normal University)
Prof.
Xu Feng
(Peking University)
Taku Izubuchi
(Brookhaven National Laboratory)
Luchang Jin
Maarten Golterman
(San Francisco State University)
