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Observation of η′ →π+π-μ+μ-
M. Ablikim, M.N. Achasov, P. Adlarson, S. Ahmed, M. Albrecht, A. Amoroso, Q. An, X.H. Bai, Y. Bai, O. BakinaShow More
Published in American Physical Society
Volume: 103
Issue: 7
Using (1310.6±7.0)×106 J/ψ events acquired with the BESIII detector at the BEPCII storage rings, the decay η′→π+π-μ+μ- is observed for the first time with a significance of 8σ via the process J/ψ→γη′. We measure the branching fraction of η′→π+π-μ+μ- to be B(η′→π+π-μ+μ-)=(1.97±0.33(stat)±0.19(syst))×10-5, where the first and second uncertainties are statistical and systematic, respectively. © 2021 authors. Published by the American Physical Society.
About the journal
JournalData powered by TypesetPhysical Review D
PublisherData powered by TypesetAmerican Physical Society