The semi-leptonic form factors of $Lambda_{b}toLambda_{c}$ and $Xi_{b}toXi_{c}$ in QCD sum rules

In this work, the full leading order results of the form factors for $Xi_{b}toXi_{c}$ and $Lambda_{b}toLambda_{c}$ are obtained in QCD sum rules. Contributions from up to dim-5 have been considered. For completeness, we also study the two-point correlation function to obtain the pole residues of $Xi_{Q}$ and $Lambda_{Q}$, and higher accuracy is achieved. For the three-point correlation function, since stable Borel regions can not be found, about $20%$ uncertainties are introduced for the form factors of $Xi_{b}toXi_{c}$ and $Lambda_{b}toLambda_{c}$. Our results for the form factors are consistent with those of the Lattice QCD within errors.