Pion form factor from 2+1 dynamical flavor lattice QCD using the O(a) improved Wilson-clover quark formalism

TL;DR

This paper reports on lattice QCD calculations of the pion's electromagnetic form factor using 2+1 dynamical flavors and improved Wilson-clover quarks, exploring small momentum transfer with twisted boundary conditions.

Contribution

It introduces a calculation of the pion form factor on PACS-CS configurations with twisted boundary conditions to access small momentum transfers.

Findings

Analyzed the $q^2$ dependence of the form factor.

Examined the light quark mass dependence.

Utilized twisted boundary conditions for precise momentum control.

Abstract

We present a status report of our calculation of the electromagnetic form factor of the pion on the PACS-CS gauge field configurations generated using Iwasaki gauge action and Wilson-clover quark action for 2 + 1 flavors of light dynamical quarks. The technique of twiseted boundary conditon is employed to explore the form factor for small momentum transfer. The $q^2$ behavior of the form factor and its light quark mass dependence is examined.