QCD Sum Rules for the Vertex \(\eta _c D^* D^*\)

IF 1.5 4区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Brazilian Journal of Physics Pub Date : 2025-05-05 DOI:10.1007/s13538-024-01631-7

B. Osório Rodrigues, M. E. Bracco, C. M. Zanetti, A. Cerqueira Jr.

引用次数: 0

Abstract

We use the QCD sum rules (QCDSR) to study the vertex \(\eta _c D^* D^*\). We compute the form factors considering that each one of its two different mesons can be taken off-shell alternately. The coupling constant of the vertex is evaluated through the extrapolation of the two different form factors that were thus obtained. The numerical result for the coupling constant is \(g_{\eta _c D^* D^*}=7.10^{+2.32}_{-2.69}\,\textrm{GeV}^{-1}\).

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顶点的QCD和规则 \(\eta _c D^* D^*\)

我们使用QCD和规则（QCDSR）来研究顶点\(\eta _c D^* D^*\)。考虑到它的两个不同介子中的每一个都可以交替地从壳层中取出，我们计算了形状因子。顶点的耦合常数通过由此获得的两种不同形状因子的外推来评估。耦合常数的数值计算结果为\(g_{\eta _c D^* D^*}=7.10^{+2.32}_{-2.69}\,\textrm{GeV}^{-1}\)。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Brazilian Journal of Physics 物理-物理：综合

CiteScore

2.50

自引率

6.20%

发文量

189

审稿时长

6.0 months

期刊介绍： The Brazilian Journal of Physics is a peer-reviewed international journal published by the Brazilian Physical Society (SBF). The journal publishes new and original research results from all areas of physics, obtained in Brazil and from anywhere else in the world. Contents include theoretical, practical and experimental papers as well as high-quality review papers. Submissions should follow the generally accepted structure for journal articles with basic elements: title, abstract, introduction, results, conclusions, and references.