Isoscalar and Isovector Kaon Form Factors from e ⁺ e ^– and τ Data

Abstract: The recent precise measurements of the e⁺e^– → K_SK_L and e⁺e^– → K⁺K^– cross sections and the hadronic spectral function of the τ^– → K^–K_Sν_τ decay are used to extract the isoscalar and isovector electromagnetic kaon form factors and their relative phase in a model-independent way. The experimental results are compared with a fit based on the vector-meson-dominance model.