Charmed-meson nonleptonic decays andSU(3) symmetry

Abstract

Based on the analysis ofSU(3) symmetry property, we propose that the Cabibbo-favoured nonleptonic decays of charmed mesons should be treated in two different cases: i) octet-octet final states and ii) octet-singlet final states. In case i) the spectator process gives correct predictions, but in case ii) the decay mechanism is different. We give a theoretical lower limit of BR(D s + →ωπ+) which cannot go through spectator process. This channel, as well as D s + →ωe+ ν are recommended to search for in experiments.