Observation of η′ →π+π-μ+μ-

BESIII Collaboration

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Article number072006
JournalPhysical Review D
Volume103
Issue number7
DOIs
Publication statusPublished - 20 Apr 2021

OECD FOS+WOS

  • 1.03 PHYSICAL SCIENCES AND ASTRONOMY

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