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The recently observed mass difference of the $D^0-\overline{D^0}$ mixing isused to predict the branching ratios of the rare top quark decays $t\tou\gamma$ and $t\to ug$ in a model independent way using the effectiveLagrangian approach. It is found that $Br(t\to u\gamma)<4\times 10^{-4}$ and$Br(t\to ug)<2\times 10^{-3}$, which still may be within reach of the LHCcollider.

Implications of $D^0-\overline{D^0}$ on the rare top quark decays $t\to u\gamma$ and $t\to ug$