pi, K+, and K-0 electromagnetic form factors - art. no. 055204

The rainbow truncation of the quark Dyson-Schwinger equation is combined wi th the ladder Bethe-Salpeter equation for the meson amplitudes and the dres sed quark-photon vertex in a self;consistent Poincare-invariant study of th e pion and kaon electromagnetic form factors in impulse approximation. We d emonstrate explicitly that the current is conserved in this approach and th at the obtained results are independent of the momentum partitioning in the Bethe-Salpeter amplitudes. With model gluon parameters previously fixed by the chiral condensate, the pion mass and decay constant, and the kaon mass , the charge radii and spacelike form factors are found to be in good agree ment with the experimental data.