Study of D0πe+νe, D+π0e+νe, D0Ke+νe, and D+K¯0e+νe in tagged decays of the ψ(3770) resonance

Abstract
Using ψ(3770)DD¯ events collected with the CLEO-c detector at the Cornell e+e storage ring, tagged by fully reconstructing one D meson in a hadronic decay mode, we measure absolute branching fractions and differential decay rates for D0πe+νe, D+π0e+νe, D0Ke+νe, and D+K¯0e+νe. The measured decay rates are used to study semileptonic form factors governing these transitions and to test unquenched Lattice QCD (LQCD) calculations. We average our results with previously published CLEO-c measurements of the same quantities using a neutrino reconstruction technique. Combining LQCD calculations of form factor absolute normalizations f+(0) and measurements of f+π(0)|Vcd| and f+K(0)|Vcs|, we find |Vcd|=0.222(8)(3)(23) and |Vcs|=1.018(10)(8)(106), where the uncertainties are statistical, experimental systematic, and from LQCD, respectively.