First Observation of a Three-Resonance Structure in $e^{+}{e}^{-}\to$Nonopen Charm Hadrons

BESIII Collaboration, M. Ablikim, M. N. Achasov +619

We report the measurement of the inclusive cross sections for $e^{+}{e}^{-}$$\to$nOCH (where nOCH denotes non-open charm hadrons) with improved precision at center-of-mass (c.m.)…