The 38th International Symposium on Lattice Field Theory

Pion electric polarizabilities from lattice QCD

29 Jul 2021, 14:45

15m

Oral presentation Hadron Structure Hadron Structure

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, $⟨\pi |J_{\mu }(x)J_{\nu }(0)|\pi ⟩$. 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.

Presentation materials

184_R3St_Luchang_Jin

pion-polarizabilities-luchang.pdf