Combination of Colour Favoured and Colour Suppressed on D Meson Decays

In this research we described the effective hamiltonian theory and applied this theory to the calculation of current-current (q1,2) and qcd penguin (q3,…,6) c quark decay rates. we calculated the decay rates of semileptonic and hadronic of charm quark in the effective hamiltonian theory. we investigated the decay rates of d meson decays according to spectator quark model (sqm) for the calculation of d meson decays. we obtained the total decay rates of semileptonic and hadronic of charm quark in the effective hamiltonian according to colour favoured (c-f) and colour suppressed (c-s). we combined them and to addedamplitude of processes colour favoured and colour suppressed (f+s) and obtained the decay rates of them.