Speaker
Description
We present our preliminary determination of the charge radii of light mesons using the PACS10 configurations, which were generated at the physical point on large volumes of more than $(10\,\text{fm})^3$ by the PACS Collaboration. In general, charge radius calculations suffer from systematic effects due to chiral extrapolation, finite lattice spacing effect, finite volume effect, and the choice of fit ansatz. By employing the PACS10 configurations, we can control the first three systematics in a unified manner. Furthermore, we apply a model-independent extraction method to avoid the systematic uncertainty associated with the fit ansatz. Our preliminary results of the charge radii for $\pi^+$, $K^+$, and $K^0$ are consistent with experimental and previous lattice determinations, while exhibiting reduced uncertainties.
