Diquarks andΛb→Λcweak decays

2007/10/31 by Hong-Wei Ke, Xue-Qian Li, Zheng-Tao Wei · 3 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1103/physrevd.77.014020

published as Phys.Rev.D77:014020,2008 · 23 pages, 3 figures

arxiv created 2008/01/23 · openalex publication_date 2008/01/23 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

In this work we investigate the weak \ensuremathΛ_b\ensuremath→\ensuremathΛ_c semileptonic and nonleptonic decays. The light-front quark model and diquark picture for heavy baryons are adopted to evaluate the \ensuremathΛ_b\ensuremath→\ensuremathΛ_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 nonleptonic decay modes \ensuremathΛ_b\ensuremath→\ensuremathΛ_cM and various polarization asymmetries are made. A comparison with other approaches is discussed.

Citations

• Measurement of the Λb0 decay form factor
• Heavy-to-light form factors on the light cone

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