Searching a systematics for nonfactorizable contributions to hadronic decays ofD0 andD+ mesons

AbstractWe investigate nonfactorizable contributions to charm meson decays in $$D \to \bar K\pi /\bar K\rho /\bar K*\pi /\bar Ka_1 /\bar K*\rho $$ modes. Obtaining the contributions from spectator-quark diagrams forNc=3, we determine nonfactorizable isospin 1/2 and 3/2 amplitudes required to explain the data for these modes. We observe that ratio of these amplitudes seem to follow a universal value.