2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/149266Known mechanisms for breaking of supersymmetry at the level of string theory imply that at least one of the internal dimensions has a very large size. Experimental detection of the associated light Kaluza-Klein (KK) excitations would be a strong hint for the existence of string like elementary objects, as no consistent field theory describing them is known. We restrict the discussion to the Scherk-Schwarz mechanism in orbifold compactifications. For this case we investigate the quantum number of the lightest predicted KK states.LATEX 6 pages. Previous file corruptedHigh Energy Physics - TheoryHigh Energy Physics - Phenomenologytext