Preface to Special Topic: Modern issues and applications of e × B plasmasPreface to Special Topic: Modern issues and applications of e ×
B plasmas
Observation of ψ (3686) →e+e-χcJ and χcJ →e+e-J /ψ=ψ are observed for the first time. The measured branching fractions are
B(ψð3686Þ → eþe−χc
J) ¼ ð11.7 2.5 1.0Þ