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 of Q2 using lattice QCD simulations with Wilson-clover valence quarks and highly improved staggered quark sea quarks. We study the form factor at the physical point with a lattice spacing a=0.076 fm. To study the lattice spacing and quark mass effects, we also present results for 300 MeV pion at two different lattice spacings a=0.04 and 0.06 fm. The lattice calculations at the physical quark mass appear to agree with the experimental results. Through fits to the form factor, we estimate the charge radius of pion for physical pion mass to be rπ2 =0.42(2) fm2.