Coupling $g_{f_0 K^+ K^-}$ and the structure of $f_0(980)$
Abstract
Description
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.
LaTex, 15 pages, 2 eps figures
LaTex, 15 pages, 2 eps figures