Λb→Σc(*) πl(ν)over-bar in the heavy quark, chiral, and large Nc limits -: art. no. 014006

被引：0
|
作者：
Lee, JP [1 ]
Liu, C
Song, HS
机构：
[1] Seoul Natl Univ, Dept Phys, Seoul 151742, South Korea
[2] Seoul Natl Univ, Ctr Theoret Phys, Seoul 151742, South Korea
[3] Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
[4] Korea Inst Adv Study, Seoul 130012, South Korea
来源：
PHYSICAL REVIEW D | 2000年 / 61卷 / 01期
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中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The decay of Lambda(b) --> Sigma(c)((*)) pi/<(nu)over bar> processes is calculated in the framework of heavy baryon chiral perturbation theory with the help of the 1/N-c expansion. The decay rate distributions over nu . nu' where nu and nu' are the four-vector velocities of Lambda(b) and Sigma(c)((*)), respectively, and over the pion and lepton energies, are given. The decay branching ratios amount to about 1.21(0.971)% for Lambda(b)-->Sigma(c) pi/<(nu)over bar> and 0.798(0.640)% for Lambda(b)-->Sigma(c)* pi/<(nu)over bar> by using the baryonic Isgur-Wise function predicted by QCD sum rules (large N-c QCD).
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