J/ψ couplings to open charm mesons from QCD sum rules

被引：29

作者：

Matheus, RD ^{[1
]}

Navarra, FS ^{[1
]}

Nielsen, M ^{[1
]}

Da Silva, RR ^{[1
]}

机构：

[1] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, Brazil

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS E-NUCLEAR PHYSICS | 2005年 / 14卷 / 04期

基金：

巴西圣保罗研究基金会;

关键词：

QCD sum rules; form factors; non-perturbative QCD; charmed mesons; effective Lagrangian;

D O I：

10.1142/S0218301305003399

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 employ QCD sum rules to calculate the J/psi form factors and coupling constants with charmed mesons, by studying three-point correlation functions. In particular, we consider the J/psi D*D and J/psi DD vertices. We determine the momentum dependence of the form factors for kinematical conditions where J/psi, D or D* are off-shell. Extrapolating to the pole of each of the form factors obtained, we determine the coupling constants. For both couplings, our results (within the errors) are compatible with estimates based on the constituent quark model.

引用

页码：555 / 567

页数：13

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