Effective Hamiltonian Approach To Fermion-antifermion Bound States In Quantum Field Theory

We discuss the effective Hamiltonian approach to fermion-antifermion bound states,rnwhich imitates its description in terms of non-relativistic potential models. Thisrnapproach is the relativistic generalization of the non-relativistic potential models. Inrnthis framework, observables such as, the ground state energy and the triplet-singletrnmass differene of light mesons are calculated. We use both linear and funnel potentialrnconfinements comparatively. Though the constituents of mesons basically interactrnthrough the exchange of vector bosons, we also consider the constituents as if theyrninteract through the exchange of pure scalar bosons

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