Observation of the charged hadron Zc±(3900) and evidence for the neutral Zc0(3900) in e+e-→ππJ/ψ at s=4170MeV

T. Xiao, S. Dobbs, A. Tomaradze, Kamal K. Seth*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

256 Scopus citations

Abstract

Using 586 pb-1 of e+e- annihilation data taken with the CLEO-c detector at s=4170MeV, the peak of the charmonium resonance ψ(4160), we analyze the decay ψ(4160)→π+π-J/ψ, and report observation of the charged state Zc±(3900) decaying into π±J/ψ at a significance level of >5σ. We obtain M(Zc±)=3886±4(stat)±2(syst)MeV and Γ(Zc±)=37±4(stat)±8(syst)MeV, which are in good agreement with the results for this resonance obtained by the BES III and Belle Collaborations in the decay of the resonance Y(4260). We also present first evidence for the production of the neutral member of this isospin triplet, Zc0(3900) decaying into π0J/ψ at a 3.5σ significance level.

Original languageEnglish (US)
Pages (from-to)366-370
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume727
Issue number4-5
DOIs
StatePublished - Dec 18 2013

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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