2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/41784In the covariant level-classification scheme of hadrons proposed recently, the existence of "chiral particles", scalar and axial-vector mesons as the partners of the ground-state pseudo-scalar and vector mesons, respectively, were predicted in the D meson and B meson systems, realizing a linear representation of chiral symmetry. In this work we reanalyze the B0 pi mass spectra through Z0 decays to show a possibility for the scalar B_0chi.6 pages, 1 eps figure, uses ptptex.styHigh Energy Physics - Phenomenologytext