Diquarks and Λ_{b}\toΛ_c weak decays

Details Diquarks and Λ_{b}\toΛ_c weak decays Diquarks and Λ_{b}\toΛ_c weak decays

2007-10-10

arxiv.org/abs/0710.1927v2

Phys.Rev.D77:014020,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

23 pages, 3 figures

Scientific paper

10.1103/PhysRevD.77.014020

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. By fitting the data of the semi-leptonic process we obtain the mass of the light scalar diquark as 817 MeV. 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.

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