2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/179148The application of our glueball-qqbar filter to the centrally produced KKbarpi system shows that the f1(1285) and f1(1420) have the same behaviour; namely consistent with the f1(1420) being the partner to the f1(1285) in the 3P1 nonet of axial mesons. We determine a flavour singlet-octet mixing angle of approximately 50 degrees for this nonet and highlight that the existence of the supposed f1(1510) needs confirmation.21 pages, Latex, 5 FiguresHigh Energy Physics - Phenomenologytext