2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/228630Spectra of masses are calculated for the families of doubly heavy baryons in the framework of nonrelativistic quark model with the QCD potential by Buchmuller--Tye. We suppose the quark-diquark structure for the wave functions and take into account the spin-dependent splittings. The physical reasons causing the existence of quazi-stable excited states in the subsystem of heavy diquark are considered for the heavy quarks of identical flavors.24 pages, revtex, 4 figures, 9 tables, revised version to appear in Physical Review DHigh Energy Physics - Phenomenologytext