2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/221411We show that the requirement of gauge invariance is not enough to fix the form of interactions between unparticles and gauge fields, thus revealing a wide new class of gauged unparticle actions. Our approach also allows us to construct operators which create gauge invariant coloured unparticles. We discuss both their perturbative and non--perturbative properties.15 pages. V2: references added. Version to appear in PRDHigh Energy Physics - TheoryHigh Energy Physics - Phenomenologytext