MODEL-INDEPENDENT EXTRACTION OF VCB FROM SEMILEPTONIC DECAYS

被引：255

作者：

NEUBERT, M

机构：

[1] Institut für Theoretische Physik der Universität Heidelberg, W-6900 Heidelberg

来源：

PHYSICS LETTERS B | 1991年 / 264卷 / 3-4期

关键词：

D O I：

10.1016/0370-2693(91)90377-3

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The possibility of a model-independent extraction of \V(cb)\ from BBAR --> D(*)l-nu-lBAR decays is discussed. In the infinite quark mass limit, the decay rates at zero recoil are fixed by a normalization condition for the hadronic form factors, which, in general, is violated by 1/m(Q) corrections. In the case of BBAR --> D* transitions, however, these are found to vanish at the normalization point. Including the full order alpha-s renormalization of the decay rates, we obtain \V(cb)\ = 0.045 +/- 0.007, a value slightly more precise than the currently best one.

引用

页码：455 / 461

页数：7

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