Light, Heavy and Double Heavy Baryons in Nonperturbative Quark Dynamics

We have studied the three quark systems in an Effective Hamiltonian approach in QCD. With only two parameters: the string tension σ = 0.15 GeV² and the strong coupling constant α_s = 0.39 we obtain a good description of the ground state light and heavy baryons. The prediction of masses of the doubly heavy baryons not discovered yet are also given. In particular, a mass of 3637 MeV for the lightest ccu baryon is found by employing the hyper spherical formalism to the three quark confining potential with the string junction.