Spectra of Doubly Heavy Quark Baryons
  Baryons containing two heavy quarks are treated in the Born-Oppenheimer approximation. Schr\"odinger equation for two center Coulomb plus harmonic oscillator potential is solved by the method of ethalon equation at large intercenter separations. Asymptotical expansions for energy term and wave function are obtained in the analytical form. Using those formulas, the energy spectra of doubly heavy baryons with various quark compositions are calculated analytically. 
D. U. Matrasulov (Uzbek Academy of Sci), M. M. Musakhanov (Uzbekistan   National University), T. Morii (Kobe University)