Pion form factor and charge radius from lattice QCD at the physical point

We present our results on the electromagnetic form factor of pion over a wide range ${Q}^{2}$ using lattice QCD simulations with Wilson-clover valence quarks and highly improved staggered quark sea quarks. study at physical point spacing $a=0.076\text{ }\text{ }\mathrm{fm}$. To mass effects, we also for 300 MeV two different spacings $a=0.04$ 0.06 fm. The calculations appear to agree experimental results. Through fits factor, estimate charge radius be $⟨{r}_{\ensuremath{\pi}}^{2}⟩=0.42(2)\text{ }{\mathrm{fm}}^{2}$.