FORM-FACTORS OF SEMILEPTONIC D-DECAYS FROM QCD SUM-RULES

被引：220

作者：

BALL, P

BRAUN, VM

DOSCH, HG

机构：

[1] Institut F̈r Theoretische Physik, Universität Heidelberg, D-6900 Heidelberg

[2] Leningrad Nuclear Physics Institute

来源：

PHYSICAL REVIEW D | 1991年 / 44卷 / 11期

关键词：

D O I：

10.1103/PhysRevD.44.3567

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We give a detailed QCD sum-rule analysis of the semileptonic decays D+ --> K0e+-nu(e)BAR and D+ --> K0*e+-nu(e)BAR. We use the standard method based on expansion in Euclidean distance as well as a new set of sum rules on the light cone. We compare the results with current experimental data and results from quark models. Special attention is paid to the t dependence of the form factors. We find from our sum-rule analysis that for the vector form factors the usual pole model approximation works perfectly well, but is not adequate for the axial-vector form factors.

引用

页码：3567 / 3581

页数：15

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