THE SCALAR CONTRIBUTION TO TAU-]K-PI-NU(TAU)

We consider the scalar form factor in tau --> K pi nu(tau) decays. It receives contributions both from the scalar resonance K-0(1430) and f rom the scalar projection of off-shell vector resonances. We construct a model for the hadronic current which includes the vector resonances K(892) and K*(1410) and the scalar resonance K-0*(1430). The paramet ers of the model are fixed by matching to the O(p(4)) predictions of c hiral perturbation theory. Suitable angular correlations of the K pi s ystem allow for a model independent separation of the vector and scala r form factor. Numerical results for the relevant structure functions are presented.