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

页码：323 / 331

页数：9

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