Evidence for factorization in three-body B-bar→D(*)K-K0 decays

Motivated by recent experimental results, we use a factorization approach to study the three-body B-bar→D(*)K-K0 decay modes. Two mechanisms are proposed for kaon pair production: current produced (from a vacuum) and transition (from the B meson). The B-bar0→D(*)+K-K0 decay is governed solely by the current-produced mechanism. As the kaon pair can be produced only by the vector current, the matrix element can be extracted from e+e-→KK-bar processes via isospin relations. The decay rates obtained this way are in good agreement with experiment. Both current-produced and transition processes contribute to B-→D(*)0K-K0 decays. By using QCD counting rules and the measured B-→D(*)0K-K0 decay rates, the measured decay spectra can be understood