Abstract
In this work, we calculate the form factors and the coupling constant of the strange-charmed vertex J/ψD *s D s in the framework of the QCD sum rules by studying their three-point correlation functions. All the possible off-shell cases are considered, D s , D * s and J/ψ, resulting in three different form factors. These form factors are extrapolated to the pole of their respective off-shell mesons, giving the same coupling constant for the process. Our final result for the J/ψD * s D s coupling constant is \(g_{J/\psi D_s^* D_s } = 4.30_{ - 1.22}^{ + 1.53} GeV^{ - 1}\).
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Osório Rodrigues, B., Bracco, M.E., Chiapparini, M. et al. A QCD sum rules calculation of the J/ψD *s Ds strong coupling constant. Eur. Phys. J. A 51, 28 (2015). https://doi.org/10.1140/epja/i2015-15028-9
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DOI: https://doi.org/10.1140/epja/i2015-15028-9