D(0) Decays From Electron-Positron Collisions: Precision, Rare and Substructure Results

Abstract

Three analyses of D0 meson decays are presented which use the data collected with the CLEO II detector at the Cornell Electron Storage Ring. First, a precision measurement of the ratio of the D0 → K-pi +pi0 branching fraction to that of D 0 → K-pi+ is performed resulting in the best measurement to date. Second, a detailed high statistics study of the underlying resonant structure of the three body decay, D0 → K -pi+pi0, is carried out. The resulting Dalitz plot is well fit by the inclusion of seven resonances, along with a non-resonant three body decay component. Finally a search for the radiative decays of the D0 meson is presented along with the four upper limits obtained.