B->D(D*) form factors in a Bethe-Salpeter model

被引：14

作者：

ElHady, AA ^{[1
]}

Datta, A ^{[1
]}

Gupta, KS ^{[1
]}

Vary, JP ^{[1
]}

机构：

[1] SAHA INST NUCL PHYS, DIV THEORY, Kolkata 700064, W BENGAL, INDIA

来源：

PHYSICAL REVIEW D | 1997年 / 55卷 / 11期

关键词：

D O I：

10.1103/PhysRevD.55.6780

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We calculate the form factors for the semileptonic decays of the B meson to D and D* mesons in a Bethe-Salpeter model. We show that our model is consistent with the constraints of heavy quark effective theory (HQET) and we extract the matrix elements that represent the I/m(Q) corrections to the form factors in HQET. We obtain (Lambda) over bar -0.55 GeV which is consistent with QCD sum rules but higher than its estimate in nonrelativistic quark model calculations. With available data, we obtain V-cb=(31.9+/-1.4)x10(-3).

引用

页码：6780 / 6787

页数：8

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