Authors Referees APS Members |
December 2007, to be published in Physical Review D1
Diquarks and $\Lambda_{b} \rightarrow \Lambda_c$ weak decays
In this work we investigate the weak $\Lambda_{b}\to\Lambda_c$ semi-leptonic and non-leptonic decays. The light-front quark model and diquark picture for heavy baryons are adopted to evaluate the $\Lambda_{b}\to\Lambda_c$ transition form factors. In the heavy quark limit we study the Isgur-Wise function. The transition form factors are obtained in the whole physical momentum regions. The numerical predictions on the branching ratios of non-leptonic decay modes $\Lambda_{b}\to\Lambda_c M$ and various polarization asymmetries are made. A comparison with other approaches is discussed. \pacs{13.30.-a, 12.39.Ki, 14.20.Lq, 14.20.Mr} © 2008 The American Physical Society.
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