Weak radiative decay Λb→Λγ in the heavy quark effective theory

被引：0
|
作者：
Giri, AK [1 ]
Mohanta, R
机构：
[1] Panjab Univ, Dept Phys, Chandigarh 160014, India
[2] Utkal Univ, Dept Phys, Bhubaneswar 751004, Orissa, India
来源：
PRAMANA-JOURNAL OF PHYSICS | 1998年 / 50卷 / 04期
关键词：
heavy quark effective theory; 1/m(Q) corrections; Isgur-Wise function;
D O I：
10.1007/BF02845554
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The weak radiative decay Lambda(b) --> Lambda gamma is studied in the heavy quark effective theory treating s-quark as heavy. This rare decay is induced by the short distance electromagnetic penguins. Including corrections of the order of (1/m(Q)), we obtain the transition matrix element and the corresponding decay width. The Isgur-Wise function is evaluated in the large N-c limit and the branching ratio obtained is 1.48 x 10(-5).
引用
收藏
页码：323 / 331
页数：9
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