A Study of e+e− Annihilation into Hadrons in the 1400–2200 MeV Energy Range with the Magnetic Detector DM1 at DCI: Observation and Study of a φ′ Vector Meson

The e+e- annihilation into hadrons has been studied for \(1.4\, < \,\sqrt {\text{S}} \, < \,2.2\) GeV. The total integrated luminosity was 1500 nb-1 over the whole energy range. Accurate magnetic analysis of charged particle momenta allowed a constrained kinematical reconstruction of events with at most one neutral missing.