Understanding B→D*-N(N)over-bar and its implications -: art. no. 034003

被引:43
|
作者
Chua, CK [1 ]
Hou, WS [1 ]
Tsai, SY [1 ]
机构
[1] Natl Taiwan Univ, Dept Phys, Taipei 10764, Taiwan
来源
PHYSICAL REVIEW D | 2002年 / 65卷 / 03期
关键词
D O I
10.1103/PhysRevD.65.034003
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The CLEO Collaboration recently reported the observation of the B-0 --> D*- p(n) over bar mode at a rate of only a factor of 4-5 lower than B-0-->D*- rho(+) and D*- pi(+). We try to understand this with a factorization approach of current produced nucleon pairs. The baryon weak vector current form factors are related by isospin rotation to nucleon electromagnetic form factors. By using G(M)(p,n) measured from e(+) e(-) --> (N) over barN and p(p) over bar-->e(+) e(-) processes, assuming factorization of the B-0-->D*- transition and p(n) over bar pair production, we are able to account for up to 60% of the observed rate. The remainder is argued to arise from the axial vector current. The model is then applied to B decays to other mesons plus p(n) over bar modes and D*- plus strange baryon pairs.
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页数:12
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