The factorization effect in $Λ_C\to Λπ$ and $Λ_C\to ΛK$

We calculated the branch ratios of $Λ_C\to ΛK$ and $Λ_C\to Λπ$ within factorization approximation. It is found that the results suffers from the uncertainties of form factors. To reduce such uncertainties, we checked the ratio of the two channels, which is obtained as $R=0.0743\pm 0.0014$. It is found that the uncertainty caused by form factors is significantly reduced. This note is prepared for the BESIII collaboration.

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