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In this article, we use the light-cone QCD sum rules to relate the$\Lambda_b$ baryon light-cone distribution amplitudes to the Isgur-Wisefunction $\xi(\omega)$ of the $\Lambda_b \to \Lambda_c$ transition, and obtaina simple relation. The numerical value of the Isgur-Wise function $\xi(\omega)$is consistent with the prediction of the QCD sum rules.

Analysis of the Isgur-Wise function of the $\Lambda_b \to \Lambda_c$ transition with light-cone QCD sum rules