![Zhao Graphic](/sites/default/files/styles/965x543/public/2021-12/Zhao%20Graphic.jpg?itok=axVdob1E)
Pion FF calculated from the a = 0.076 fm (m = 140 MeV) lattice with Wilson-clover valence quarks and HISQ sea quarks [35], compared with the experimental data from CERN [37] and the F collaboration [3]. The purple band is from the dispersion relation analysis of experimental data [38], and the blue dashed band is an extrapolation of our lattice results to larger Q2 .