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Eurasia – The Territory of the Future 10 International Economic Forum June 24-25, 2021 Conference Proceeding
(Istanbul Arel University, 2021)
Eurasia – The Territory of the Future 10 International Economic Forum June 24-25, 2021 Conference Proceeding
Observation of the double Dalitz decay eta' -> e(+)e(-)e(+)e(-)
(Observation of the double Dalitz decay η′ →e+e-e+e-, 2022)
Based on (10087±44)×106 J/ψ events collected with the BESIII detector at BEPCII, the double Dalitz decay η′→e+e-e+e-is observed for the first time via the J/ψ→γη′ decay process. The significance is found to be 5.7σ with ...