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- W2090695028 abstract "Abstract We present a detailed study of the decays ϒ ′ → π + π − ϒ and ϒ ′ → π 0 π 0 ϒ , where the ϒ decays subsequently to e + e − or μ + μ − . The results are obtained from a sample of 146 000 ϒ′ decays observed with the CUSB detector at the Cornell Electron Storage Ring. We derive branching fractions of (18.9 ± 2.6)% for ϒ ′ → π ′ π − ϒ and (10.3 ± 2.3)% for ϒ ′ → π 0 π 0 ϒ , and determined partial widths for these decays. Invariant mass and angular distributions of both the π + π − and π 0 π 0 systems are presented. We also set a limit on the branching fraction for ϒ ′ → ηϒ of less than 0.2% at the 90% confidence level." @default.
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- W2090695028 date "1984-08-01" @default.
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- W2090695028 title "A study of hadronic decays of the ϒ′" @default.
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- W2090695028 doi "https://doi.org/10.1016/0550-3213(84)90131-7" @default.
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