2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/177667We discuss scenarios for scalar glueballs using arguments based on sum rules, spectral decomposition, the $\frac{1}{N_c}$ approximation, the scales of the strong interaction and the topology of the flux tubes. We analyze the phenomenological support of those scenarios and their observational implications. Our investigations hint a rich low lying glueball spectrum.11 pages: New title, figure, table and a more detailed comparison with experimentsHigh Energy Physics - Phenomenologytext