A QCD sum rules calculation of the ηcD*D and ηcDs*Ds form factors and strong coupling constants

被引：4
|
作者：
Osorio Rodrigues, B. [1 ]
Bracco, M. E. [2 ]
Zanetti, C. M. [2 ]
机构：
[1] Univ Estado Rio de Janeiro, Inst Aplicacao Fernando Rodrigues da Silveira, Rua Santa Alexandrina 288, BR-20261232 Rio De Janeiro, RJ, Brazil
[2] Univ Estado Rio de Janeiro, Fac Tecnol, Polo Ind, Rod Presidente Dutra Km 298, BR-27537000 Resende, RJ, Brazil
来源：
NUCLEAR PHYSICS A | 2017年 / 966卷
关键词：
QCD sum rules; Strong coupling constant; Form factor; Three meson vertex; RESONANCE PHYSICS; VERTEX; MESONS;
D O I：
10.1016/j.nuclphysa.2017.07.002
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
We use the QCD sum rules for the three point correlation functions to compute the strong coupling constants of the meson vertices eta D-c*D and eta D-c(s)*D-s. We consider perturbative and non-perturbative contributions, working up to dimension five on the OPE. The vertices were studied considering that each one of its three mesons are off-shell alternately. The vertex coupling constant is evaluated through the extrapolation of the three different form factors. The results obtained for the coupling constants are g(eta c)D*D = 5.23(-1.38)(+1.80) and g(eta c)D(s)*D-s = 5.55(-1.55)(+1.29) (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：208 / 223
页数：16
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