2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/192606The mass spectra of the excited heavy baryons consisting of two light (u,d,s) and one heavy (c,b) quarks are calculated in the heavy-quark--light-diquark approximation within the constituent quark model. The light quarks, forming the diquark, and the light diquark in the baryon are treated completely relativistically. The expansion in v/c up to the second order is used only for the heavy (b and c) quarks. The internal structure of the diquark is taken into account by inserting the diquark-gluon interaction form factor. An overall good agreement of the obtained predictions with available experimental data is found.13 pages; changed title; added Table VIII, note on new experimental data and references; version to be published in Phys.Lett.BHigh Energy Physics - Phenomenologytext