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- W1484176146 abstract "We search for the M1 radiative transition ψ(3686)→γηc(2S) by reconstructing the exclusive ηc(2S)→KS0K±π∓π+π− decay using 1.06×108 ψ(3686) events collected with the BESIII detector. The signal is observed with a statistical significance of greater than 4 standard deviations. The measured mass of the ηc(2S) is 3646.9±1.6(stat)±3.6(syst) MeV/c2, and the width is 9.9±4.8(stat)±2.9(syst) MeV/c2. The product branching fraction is measured to be B(ψ(3686)→γηc(2S))×B(ηc(2S)→KS0K±π∓π+π−)=(7.03±2.10(stat)±0.70(syst))×10−6. This measurement complements a previous BESIII measurement of ψ(3686)→γηc(2S) with ηc(2S)→KS0K±π∓ and K+K−π0.Received 8 January 2013DOI:https://doi.org/10.1103/PhysRevD.87.052005© 2013 American Physical Society" @default.
- W1484176146 created "2016-06-24" @default.
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