Abstract
Properties of two-particle bound states composed of spin-zero and spin-half constituents have been investigated within a relativistic field model based on new analytically (infrared) confined propagators. A new mass scale dependence of the strong effective coupling has been obtained. By using this dependence, new estimates on the mass spectrum and leptonic decay constants of mesons have been performed with reasonable accuracy. Independent and new estimates have been obtained for the mass and radius of the lowest (scalar) glueball.
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