Resonant Two-Body D Decays

The contribution of a K{sup *}(1430) 0{sup +} resonance to D{sup 0}{yields}K{sup -}{pi}{sup +} is calculated by applying the soft pion theorem to D{sup +}{yields}K{sup *}{pi}{sup +} , and is found to be about 30% of the measured amplitude and to be larger than the {delta}I=3/2 component of this amplitude. We estimate a 70% contribution to the total amplitude from a higher K{sup *}(1950) resonance. This implies large deviations from factorization in D decay amplitudes, a lifetime difference between D{sup 0} and D{sup +} , and an enhancement of D{sup 0}-D(bar sign){sup 0} mixing due to SU(3) breaking. (c) 1999 The American Physical Society.