2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/202430We study the flavour singlet mesons from first principles using lattice QCD. We explore the splitting between flavour singlet and non-singlet for vector and axial mesons as well as the more commonly studied cases of the scalar and pseudoscalar mesons.12 pages, LATEX, 4 ps figuresHigh Energy Physics - Latticetext