Zhang, YJ (reprint author), CAS, Inst High Energy Phys, Beijing 100049, Peoples R China.
One meson exchange potential of the K(K) over bar system is studied. When momentum-squared terms are included, the one meson (rho, omega, phi) exchange potential alone fails to produce any K(K) over bar bound state. With the Coulomb potential, K+K- can form atomic bound state-the kaonium. The influence of the one meson exchange potential on the ground state energy of kaonium and its decay widths to pi pi and pi eta are evaluated.