Exclusive nonleptonic decays of bottom and charm baryons in a relativistic three-quark model: Evaluation of nonfactorizing diagrams

被引：107

作者：

Ivanov, MA ^{[1
]}

Korner, JG

Lyubovitskij, VE

Rusetsky, AG

机构：

[1] Joint Inst Nucl Res, Bogoliubov Lab Theoret Phys, Dubna 141980, Moscow Region, Russia

[2] Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany

[3] Tomsk State Univ, Dept Phys, Tomsk 634050, Russia

[4] Tbilisi State Univ, IHEP, GE-380086 Tbilisi, Georgia

来源：

PHYSICAL REVIEW D | 1998年 / 57卷 / 09期

关键词：

D O I：

10.1103/PhysRevD.57.5632

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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-->qud the total contribution of the nonfactorizing diagrams amount up to similar to 60% of the factorizing contributions in amplitude, and up to similar to 30% for b-->c(u) over bard$ 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.

引用

页码：5632 / 5652

页数：21

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