The 1/m_c and 1/m_b corrections to the \Lambda_b to \Lambda_c semi- leptonic decay are analyzed by QCD sum rules. Within the framework of heavy quark effective theory,the subleading baryonic Isgur-Wise func- tion of \Lambda_b to \Lambda_c has been calculated. It is shown that the corrections due to the 1/m Lagrangian insertion are negligibly small. The sizable 1/m_Q effect to the decay lies only in the weak current. The decay spectrum and the branching ratio are given.
@article{arxiv.hep-ph/9608277,
title = {QCD Sum Rule Analysis for the \Lambda_b to \Lambda_c Semileptonic Decay},
author = {Yuan-ben Dai and Chao-shang Huang and Ming-qiu Huang and Chun Liu},
journal= {arXiv preprint arXiv:hep-ph/9608277},
year = {2011}
}
Comments
LateX, 16 pages including 3 figs, to appear in Phys. Lett.B