Abstract
The decays of charmed particles are because of the product of certain currents. The decays of charmed non-strange particles must produce predominantly strange particles. This applies both to leptonic and non-leptonic decays. The chapter presents quark decays responsible for leptonic decays of charmed particles, the Cabibbo factors suppressing decay rates, selection rules, and examples of decays. Creation of charmed particles in neutrino experiments and the subsequent decay of these particles result in the dileptonic events. Such dileptonic events are observed in high-energy neutrino experiments. The branching ratio of non-leptonic decays is slightly enhanced if virtual gluons are taken into account. The chapter further highlights the isospin and SU(3) symmetry selection rules that govern the main non-leptonic decays of charmed particles. The sextet enhancement of charmed particle decay is an analog of the octet enhancement in decays of strange particles.
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