Semi-leptonic decays of D-mesons in lattice QCD

The results of a lattice calculation of D-meson semileptonic decays into pseudoscalar and vector particles are presented. With respect to previous studies of D decays to K, polarized K, pi, and rho, the statistis could be doubled, and the SU(3) breaking effects on the relevant form factors were studied. The Zweig allowed contributions to the form factors and the corresponding partial rates for the semileptonic decays of D and D(sub S) into phi, omega, eta and eta' mesons were predicted. The lattice results for the form factor which govern semileptonic decays into pi and K mesons are in good agreement with experimental results.