Based on a sample of η′ mesons produced in the radiative decay J/ψ→γη′ in 1.31×109 J/ψ events collected with the BESIII detector, the decay η′→ωe+e- is observed for the first time, with a statistical significance of 8σ. The branching fraction is measured to be B(η′→ωe+e-)=(1.97±0.34(stat)±0.17(syst))×10-4, which is in agreement with theoretical predictions. The branching fraction of η′→ωγ is also measured to be (2.55±0.03(stat)±0.16(syst))×10-2, which is the most precise measurement to date, and the relative branching fraction B(η′→ωe+e-)B(η′→ωγ) is determined to be (7.71±1.34(stat)±0.54(syst))×10-3
Based on a data sample of (1.0087±0.0044)×1010 J/ψ events collected by the BESIII detector at the BE...
We report a measurement of the observed cross sections of e+ e− → J/ψX based on 3.21 fb − 1 of data ...
We report a measurement of the observed cross sections of e+e-→J/ψX based on 3.21 fb-1 of data accum...
Based on a sample of η′ mesons produced in the radiative decay J/ψ→γη′ in 1.31×109 J/ψ events collec...
Based on a sample of 1.31 billion J/ψ events collected with the BESIII detector, we report the study...
We report the first observation of the Dalitz decay η′→γe+e−, based on a data sample of 1.31 billion...
Using 4.479 × 108 ψð3686Þ events collected with the BESIII detector, we search for the decays ψð3686...
Based on a sample of (1310.6±7.0)×106J/ψ events collected with the BESIII detector, we present measu...
Using a data sample of 448.1×106 ψ(3686) events collected with the BESIII detector at the BEPCII col...
Using a data sample of (448.1±2.9)×106 ψ(3686) decays collected by the BESIII detector at the Beijin...
By analyzing (448.1±2.9)×106 ψ(3686) events collected with the BESIII detector operating at the BEPC...
We report the first observation of the Dalitz decay η’→γe+e−, based on a data sample of 1.31 billion...
By analyzing an e+e- data sample corresponding to an integrated luminosity of 2.93 fb-1 taken at a c...
We observe the process ψ(3686)→pp̄η′ for the first time, with a statistical significance higher than...
By analyzing ð448.1 ` 2.9Þ × 106 ψ ð3686Þ events collected with the BESIII detector operating at the...
Based on a data sample of (1.0087±0.0044)×1010 J/ψ events collected by the BESIII detector at the BE...
We report a measurement of the observed cross sections of e+ e− → J/ψX based on 3.21 fb − 1 of data ...
We report a measurement of the observed cross sections of e+e-→J/ψX based on 3.21 fb-1 of data accum...
Based on a sample of η′ mesons produced in the radiative decay J/ψ→γη′ in 1.31×109 J/ψ events collec...
Based on a sample of 1.31 billion J/ψ events collected with the BESIII detector, we report the study...
We report the first observation of the Dalitz decay η′→γe+e−, based on a data sample of 1.31 billion...
Using 4.479 × 108 ψð3686Þ events collected with the BESIII detector, we search for the decays ψð3686...
Based on a sample of (1310.6±7.0)×106J/ψ events collected with the BESIII detector, we present measu...
Using a data sample of 448.1×106 ψ(3686) events collected with the BESIII detector at the BEPCII col...
Using a data sample of (448.1±2.9)×106 ψ(3686) decays collected by the BESIII detector at the Beijin...
By analyzing (448.1±2.9)×106 ψ(3686) events collected with the BESIII detector operating at the BEPC...
We report the first observation of the Dalitz decay η’→γe+e−, based on a data sample of 1.31 billion...
By analyzing an e+e- data sample corresponding to an integrated luminosity of 2.93 fb-1 taken at a c...
We observe the process ψ(3686)→pp̄η′ for the first time, with a statistical significance higher than...
By analyzing ð448.1 ` 2.9Þ × 106 ψ ð3686Þ events collected with the BESIII detector operating at the...
Based on a data sample of (1.0087±0.0044)×1010 J/ψ events collected by the BESIII detector at the BE...
We report a measurement of the observed cross sections of e+ e− → J/ψX based on 3.21 fb − 1 of data ...
We report a measurement of the observed cross sections of e+e-→J/ψX based on 3.21 fb-1 of data accum...