QCD Sum Rule Analysis for the Λ_b to Λ_c Semileptonic Decay
classification
✦ hep-ph
keywords
lambdadecaycorrectionsanalysisanalyzedbaryonicbeenbranching
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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.
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