The $a_0{K}^{+}{K}^{-}$-vertex in light cone QCD sum rules

Abstract

We investigate the $a_0{K}^{+}{K}^{-}$-vertex in the framework of light cone QCD sum rules. We estimate the coupling constant g${}_{a_0{K}^{+}{K}^{-}}$ which is an essential ingredient in the analysis of physical processes involving $a_0(980)$ meson. Our result is somewhat larger than the previous determinations of this coupling constant.

Comments: 8 pages, 1 figure