The $g_{J/\psi D_s D_s}$ strong coupling constant from QCD Sum Rules
Autor: | Rodrigues, Bruno Osório, Bracco, Mirian Enriqueta, Chiapparini, Marcelo |
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Rok vydání: | 2013 |
Předmět: | |
Druh dokumentu: | Working Paper |
DOI: | 10.1016/j.nuclphysa.2014.06.008 |
Popis: | 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 $g_{J/\psi D_s D_s} = 5.98^{+0.67}_{-0.58}$. Comment: 15 pages, 6 figures |
Databáze: | arXiv |
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