The \(D_sDK^\) vertex in QCD Sum Rules: form factors and coupling constant

In this work we study the meson vertex \(D_sDK^*\) using the QCD sum rules. We compute the three point correlation functions for the three cases of different off-shell mesons. The form factors for each case are fitted to the numerical calculation of the correlation functions and the coupling constan...

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Bibliographic Details
Published inarXiv.org
Main Authors Cerqueira, A, B Osório Rodrigues, Bracco, M E, Zanetti, C M
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 06.12.2021
Subjects
Coupling
Form factors
Mathematical analysis
Mesons
Sum rules
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Summary:In this work we study the meson vertex \(D_sDK^*\) using the QCD sum rules. We compute the three point correlation functions for the three cases of different off-shell mesons. The form factors for each case are fitted to the numerical calculation of the correlation functions and the coupling constant of the vertex is obtained by comparing the form factors at their respective off-shell meson pole. The result obtained for the coupling constant is \(g_{D_sDK^*} = 2.29^{+0.65}_{-0.41}\).
ISSN:2331-8422
DOI:10.48550/arxiv.2112.03146