Next-to-next-to-leading order relation between R(e+e-→b(b)over-bar) and Γs1(b→clv1) and precise determination of |Vcb|

被引：14

作者：

Penin, AA ^{[1
]}

Pivovarov, AA ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia

来源：

PHYSICS LETTERS B | 1998年 / 443卷 / 1-4期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1016/S0370-2693(98)01323-9

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the next-to-next-to-leading order relation between the moments of the Upsilon system spectral density and the inclusive B-meson semileptonic width. The perturbative series for the width as an explicit function of the moments is well convergent in three consequent orders in the strong coupling constant that provides solid and accurate theoretical estimate. As a result, the uncertainty of the value of [V-cb] Cabibbo-Kobayashi-Maskawa matrix element is reduced. (C) 1998 Published by Elsevier Science B.V. All rights reserved.

引用

页码：264 / 268

页数：5

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