Coupling $g_{f_0 K^+ K^-}$ and the structure of $f

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/179042We 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.LaTex, 15 pages, 2 eps figuresHigh Energy Physics - PhenomenologyCoupling $g_{f_0 K^+ K^-}$ and the structure of $f_0(980)$text