2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/41776We present some arguments in favour of that the Kaluza-Klein picture of the world has been confirmed in the experiments at very low energies where the nucleon-nucleon dynamics has been studied. Early predicted ${\cal L}$-particle is related to the new scale of strong nucleon-nucleon forces in the spirit of Kaluza-Klein approach. It is shown that KK excitations remarkably describe the experimentally observed mass spectrum of diproton system.11 pages, 3 figures, Latex2e;an explanation of (super)narrowness of dibaryon resonances added; Table 2 slightly corrected, some explanation addedHigh Energy Physics - PhenomenologyNuclear Theorytext