Exclusive Nonleptonic Decays of Bottom and Charm Baryons in a Relativistic Three-Quark Model: Evaluation of Nonfactorizing Diagrams

A. G. Rusetsky (JINR; Dubna; Dubna); Inst. Phys.); J. G. Korner (Mainz U.; M. A. Ivanov (JINR; Tbilisi U.); Tomsk U.); V. E. Lyubovitskij (JINR

Exclusive Nonleptonic Decays of Bottom and Charm Baryons in a Relativistic Three-Quark Model: Evaluation of Nonfactorizing Diagrams

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arxiv hep-ph/9709372 v2 submitted 1997-09-17 hep-ph

M. A. Ivanov (JINR , Dubna) , J. G. Korner (Mainz U. , Inst. Phys.) , V. E. Lyubovitskij (JINR , Dubna , Tomsk U.) , A. G. Rusetsky (JINR

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Tbilisi U.)

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keywords decaysmodelnonfactorizingnonleptonicapproximatelybaryonsbottomcharm

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Exclusive nonleptonic decays of bottom and charm baryons are studied within a relativistic three-quark model with a Gaussian shape for the momentum dependence of the baryon-three-quark vertex. We include factorizing as well as nonfactorizing contributions to the decay amplitudes. For heavy-to-light transitions Q -> q u d the total contribution of the nonfactorizing diagrams amount up to approximately 60% of the factorizing contributions in amplitude, and up to approximately 30% for b -> c u d transitions. We calculate the rates and the polarization asymmetry parameters for various nonleptonic decays and compare them to existing data and to the results of other model calculations.

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