<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>ψ</mml:mi></mml:math>Particles, SU(4), and Anomalous Currents

Abstract

We propose assignment of the new $\ensuremath{\psi}$ particles in an SU(4) symmetry scheme, incorporating SU(3) and a new additive quantum number, paracharge $Z$. Anomalous currents are introduced to account for the production and decays of these particles. Two more rather broad resonances at around 4.3 and 5.0 (\ifmmode\pm\else\textpm\fi{}0.2) GeV are expected in the ${e}^{+}{e}^{\ensuremath{-}}$ annihilation, one of which has recently been reported (at 4.15 GeV).