2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/179128In a nonrelativistic constituent quark model we find a constraint on the mixing angle of the strange axial-vector mesons, $35^o\stackrel{<}{\sim } θ_K\stackrel{<}{\sim }55^o,$ determined solely by two parameters: the mass difference of the $a_1$ and $b_1$ mesons and the ratio of the constituent quark masses.8 pages, LaTeXHigh Energy Physics - Phenomenologytext