Order alpha(s)(2)beta(0) correction to the charged lepton spectrum in b->cl-(nu)over-bar(l) decays

被引：49

作者：

Gremm, M

Stewart, I

机构：

[1] California Institute of Technology, Pasadena, CA

来源：

PHYSICAL REVIEW D | 1997年 / 55卷 / 03期

关键词：

D O I：

10.1103/PhysRevD.55.1226

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We compute the alpha(s)(2) beta(0) part of the two-loop QCD corrections to the charged lepton spectrum in b-->cl<(nu)over bar>(l) decays and find them to be about 50% of the first order corrections at all lepton energies, except those close to the end point. Including these corrections we extract the central values <(Lambda)over bar> = 0.33 GeV and lambda(1) = -0.17 GeV2 for the HQET matrix elements and use them to determine the <(MS)over bar> b and c quark masses, and \V-cb\.

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页码：1226 / 1232

页数：7

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