THE VECTOR AND SCALAR FORM-FACTORS OF THE PION TO 2 LOOPS

We calculate the vector and scalar form factors of the pion to two loo ps in Chiral Perturbation Theory. We estimate the unknown O(p(6)) cons tants using resonance exchange. We make a careful comparison to the av ailable data and determine two O(p(4)) constants rather precisely, and two O(p(6)) constants les precisely. We also use Chiral Perturbation Theory to two loops to extract in a model-independent manner the charg e radius of the pion from the available data, and obtain [r(2)](V)(pi) = 0.437 +/- 0.016 fm(2).