Decays of Charmed Vector Mesons --- eta-pi^0 mixing as an origin of isospin non-conservation ---

Pion emitting decays and radiative ones of D^{+,0} and D_s^{+} are studied. As the result, the full-width of D^{0} is predicted, by assuming the isospin symmetry. In addition, the isospin non-conserving D_s^{+} --> D_s^+ pi^0 decay is investigated under the assumption that it proceeds through the eta-pi^0 mixing.