Belle's review reports a 6.7 sigma enhancement near 10.75 GeV in e+e- to Upsilon(nS) pi+ pi- plus first observations and new upper limits in charmonium and bottomonium decays.
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Recent Results on Charmonia- and Bottomonia-like Particles at Belle
Belle's review reports a 6.7 sigma enhancement near 10.75 GeV in e+e- to Upsilon(nS) pi+ pi- plus first observations and new upper limits in charmonium and bottomonium decays.