A QCDSR calculation of the J/ψD* sDs strong coupling constant

8th International Workshop on Hadron Physics

Rodrigues, B. Osório^1 ; Bracco, M.E.^2 ; Chiapparini, M.^1 ; Cerqueira, A.^3

Instituto de Física, Universidade Do Estado Do Rio de Janeiro, Rua São Francisco Xavier 524, Rio de Janeiro, RJ

20550-900, Brazil^1

Faculdade de Tecnologia, Universidade Do Estado Do Rio de Janeiro, Rodovia Presidente Dutra km 298, Resende, RJ

27537-000, Brazil^2

Centro Universitário de Volta Redonda, UniFOA, Avenida Paulo Erlei Alves Abrantes 1325, Volta Redonda, RJ

27240-560, Brazil^3

关键词: Coupling constants;    Form factors;    QCD sum rules;    Strong coupling;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/706/5/052003/pdf
DOI  :  10.1088/1742-6596/706/5/052003

来源: IOP

【 摘 要 】

In this work, we evaluate the coupling constant and the form factors of the vertex J/ψDsusing the techniques of the QCD sum rules. We consider all the three mesons off shell, resulting in three different form factors. However, despite the different form factors, when extrapolated to the pole of each off-shell meson, we find coupling constants that are in completely agreement each other. The result for the vertex J/ψDscoupling constant is gJψD∗sDs=4.30+0.42-0.37GeV-1.