The \(g_{J/\psi D_s D_s}\) strong coupling constant from QCD Sum Rules

The coupling constant of the meson vertex \(J/\psi D_s D_s\) is calculated using the three point correlation function within the QCD Sum Rule formalism. We have considered alternately mesons \(J/\psi\) and \(D_s\) off-shell together with non-perturbative contributions up to the mixed quark-gluon con...

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Bibliographic Details
Published in:arXiv.org 2013-09
Main Authors: Bruno Osório Rodrigues, Bracco, Mirian Enriqueta, Chiapparini, Marcelo
Format: Article
Language:English
Subjects:
Coupling
Form factors
Mesons
Sum rules
Online Access:Get full text
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Summary:The coupling constant of the meson vertex \(J/\psi D_s D_s\) is calculated using the three point correlation function within the QCD Sum Rule formalism. We have considered alternately mesons \(J/\psi\) and \(D_s\) off-shell together with non-perturbative contributions up to the mixed quark-gluon condensates. When extrapolated, these two different form factors give the same coupling constant for the process \(g_{J/\psi D_s D_s} = 5.98^{+0.67}_{-0.58}\).
ISSN:2331-8422
DOI:10.48550/arxiv.1309.1637