2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/85683The neutral vector meson resonances, phi, J/psi, Bs* and Upsilon, and the tau lepton occupy consecutive mass levels in a geometric series which also includes the muon and the neutral vector boson, Z, in a symmetric arrangement. The mass of the tau lepton is equal to the geometric mean of the phi and J/psi masses.3 pages, including 1 figureGeneral Physicstext