Light meson form factors in N_f=2+1 QCD with dynamical overlap quarks

TL;DR

This paper presents a calculation of pion and kaon form factors in three-flavor QCD using overlap quarks, analyzing their chiral behavior and comparing K to pi form factors with experimental data.

Contribution

First calculation of meson form factors in N_f=2+1 QCD with overlap quarks on a 16^3×48 lattice at near-physical pion masses.

Findings

Preliminary results on electromagnetic and scalar form factors.

Comparison shows consistency with experimental shape of K to pi form factors.

Analysis of chiral behavior of meson form factors.

Abstract

We report on our calculation of pion and kaon form factors in three-flavor QCD using the overlap quark action. Gauge ensembles are generated on a 16^3 \times 48 lattice at a lattice spacing of 0.11 fm with pion masses down to 310 MeV. Connected and disconnected meson correaltors are calculated using the all-to-all quark propagator. We present our preliminary analysis on the chiral behavior of the electromagnetic and scalar form factors as well as a comparison of the shape of the K to pi form factors with experiment.