Chiral behavior of light meson form factors in 2+1 flavor QCD with exact chiral symmetry

TL;DR

This paper investigates the chiral behavior of light meson form factors in 2+1 flavor QCD using overlap quarks, providing precise calculations and analysis with chiral perturbation theory at near-physical pion masses.

Contribution

It presents the first detailed study of light meson form factors in 2+1 flavor QCD with exact chiral symmetry at multiple pion masses down to 300 MeV.

Findings

Precise calculations of pion and kaon electromagnetic form factors.

Analysis of form factors using next-to-next-to-leading order chiral perturbation theory.

Insights into chiral behavior of meson form factors at near-physical pion masses.

Abstract

We present a study of chiral behavior of light meson form factors in QCD with three flavors of overlap quarks. Gauge ensembles are generated at single lattice spacing 0.12 fm with pion masses down to 300 MeV. The pion and kaon electromagnetic form factors and the kaon semileptonic form factors are precisely calculated using the all-to-all quark propagator. We discuss their chiral behavior using the next-to-next-to-leading order chiral perturbation theory.