D*Dπ and B*Bπ form factors from QCD sum rules

被引：96
作者：
Navarra, FS
Nielsen, M
Bracco, ME
Chiapparini, M
Schat, CL
机构：
[1] Univ Sao Paulo, Inst Fis, BR-05389970 Sao Paulo, Brazil
[2] Univ Estado Rio De Janeiro, Inst Fis, BR-20559900 Rio De Janeiro, Brazil
来源：
PHYSICS LETTERS B | 2000年 / 489卷 / 3-4期
基金：
巴西圣保罗研究基金会;
关键词：
D O I：
10.1016/S0370-2693(00)00967-9
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The H * H pi form factor for H = B and D mesons is evaluated in a QCD sum rule calculation. We study the Borel sum rule for the three point function of two pseudoscalar and one vector meson currents up to order four in the operator product expansion. The double Borel transform is performed with respect to the heavy meson momenta. We discuss the momentum dependence of the form factors and two different approaches to extract the H * H pi coupling constant. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：319 / 328
页数：10
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