Abstract
In this brief review, we examine carefully and critically the status of search for (i) the ψ(11P1) charmonium state and (ii) the ϒ(11P1) state of bottonium. We wish to emphasize in particular that the strategic debate between Kuang-Yan and Voloshin concerning the size of the branching ratio for the transition ϒ(3S)→ϒ(11P1)ππ and the reality of the ISR events for the existence of ψ(11P1) in charmonium can be resolved in a more straightforward manner by (iii) measuring the decay rates ϒ(1D, 2D)→ϒππ and ψ(3770)→J/ψππ together with the amount of S-D mixing in the ψ′(3684)−ψ″(3770) system. Preliminary data are already available from Crystal Ball, Mark II and Mark III experiments concerning ψ″(3770)→J/ψππ rate supportive of Kuang-Yan. We also discuss the current situation in ϒ(3S)→ϒ(1S, 2S)ππ dipion mass spectra, in the context of the expected mass spectrum for ϒ(3S)→ϒ(11P1)ππ.
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