2013/11/04 by Zhiqing Liu, Liu, Zhiqing
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.48550/arxiv.1311.0762
To appear in the proceedings of The 6th International Workshop on Charm Physics (CHARM 2013)
arxiv created 2013/11/04 · openalex publication_date 2013/11/04 · arxiv updated 2013/11/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Using 525 pb-1 data collected with the BESIII detector at e+e- central-of-mass energy 4.26 GeV, the BESIII Collaboration observed a charged charmoniumlike state Zc(3900)→π±J/ψ with mass M[Zc(3900)]=3899.0± 3.6 ± 4.9 MeV/c2, and width Γ[Zc(3900)]=46± 10 ± 20 MeV. The significance of this state was estimated to be >8σ in all kinds of systematic tests. Using 967 fb-1 data recorded by the Belle detector on or near Υ(nS), n=1, 2, ⋯, 5 resonances, the e+e- → π+π-J/ψ process has been studied through initial-state-radiation (ISR) method. Except for the Y(4260) resonance, an intermediate state Z(3900)± has been observed in the π±J/ψ mass spectrum, with significance >5.2σ. The measured mass M[Z(3900)±]=3894.5±6.6±4.5 MeV/c2 and width Γ[Z(3900)±]=63±24±26 MeV, shows good agreement with the BESIII measurement within errors, which means Zc(3900) and Z(3900)± is the same state.