Speaker
Description
We report a preliminary study of light meson charge radii based on the PACS10 configurations generated by the PACS Collaboration at the physical point in spatial volumes larger than $(10\,\text{fm})^3$. Lattice QCD calculations of charge radii are generally subject to several sources of systematic uncertainty, including chiral extrapolation, discretization effects, finite-volume effects, and the parametrization of the momentum transfer dependence of the form factor. The PACS10 configurations enable us to address the first three sources of uncertainty within a unified framework. In addition, we employ a model-independent extraction method to eliminate the systematic dependence on a particular fit ansatz. Our preliminary estimates of the charge radii of the $\pi^+$, $K^+$, and $K^0$ are in agreement with experimental measurements and previous lattice-QCD determinations, while achieving reduced uncertainties.