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arXiv · hep-ph/0301267

Coupling $g_{f_0 K^+ K^-}$ and the structure of $f_0(980)$

P. Colangelo·F. De Fazio
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Abstract

We use light-cone QCD sum rules to evaluate the strong coupling $g_{f_0 K^+ K^-}$ which enters in several analyses concerning the scalar $f_0(980)$ meson. The result: $6.2\le g_{f_0 K^+ K^-}\le 7.8$ GeV is larger than in previous determinations.

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P. Colangelo, F. De Fazio. 2003-04-28. Coupling $g_{f_0 K^+ K^-}$ and the structure of $f_0(980)$. https://doi.org/10.1016/s0370-2693(03)00308-3

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