Nonleptonic decays of charmed mesons. Part 3. Tests of isospin selection rules in exclusive and semi-inclusive decays of charged D-mesons

In the Cabibbo-allowed decays of the charged D-meson, the standard model predicts that the isospin of the final state must be pure T = 3/2 for nonleptonic decays, and T = 1/2 for semi-leptonic decays. The consequences of these isospin rules for the ratios of K- final states to anti K0 final states are determined in both exclusive channels and in semi-leptonic ones. These ratios are bounded, and present data do not violate these bounds, but they are too sparse to make any definitive tests. Other predictions of the selection rules, such as the Dalitz plot for anti Kππ modes are also discussed