Abstract
The contribution of the diquark and antidiquark system to the charmed meson decay into two pseudoscalar mesons is studied. The diquark and antidiquark system is approximated by the exotic meson state. In our model, the relative ratio of the various partial decay width is explained without referring to the penguin diagram. The data that Γ(D0→K-π+) is larger than Γ(D+→K0π+) implies that the contribution from (qq)6⊗(qq)6* exotic meson is small. Some predictions for the F-meson and the bottomed meson decay are presented.
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