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Observation of two new N* resonances in the decay ψ(3686)→pp̄π0

  • M. Ablikim
  • , M. N. Achasov
  • , D. J. Ambrose
  • , F. F. An
  • , Q. An
  • , Z. H. An
  • , J. Z. Bai
  • , Y. Ban
  • , J. Becker
  • , N. Berger
  • , M. Bertani
  • , J. M. Bian
  • , E. Boger
  • , O. Bondarenko
  • , I. Boyko
  • , R. A. Briere
  • , V. Bytev
  • , X. Cai
  • , A. Calcaterra
  • , G. F. Cao
  • J. F. Chang, G. Chelkov, G. Chen, H. S. Chen, J. C. Chen, M. L. Chen, S. J. Chen, Y. Chen, Y. B. Chen, H. P. Cheng, Y. P. Chu, D. Cronin-Hennessy, H. L. Dai, J. P. Dai, D. Dedovich, Z. Y. Deng, A. Denig, I. Denysenko, M. Destefanis, W. M. Ding, Y. Ding, L. Y. Dong, M. Y. Dong, S. X. Du, J. Fang, S. S. Fang, L. Fava, F. Feldbauer, C. Q. Feng, R. Poling, BESIII Collaboration

Research output: Contribution to journalArticlepeer-review

Abstract

Based on 106×106ψ(3686) events collected with the BESIII detector at the BEPCII facility, a partial wave analysis of ψ(3686) →pp̄π0 is performed. The branching fraction of this channel has been determined to be B(ψ(3686)→pp̄π0)=(1.65±0. 03±0.15)×10-4. In this decay, 7 N* intermediate resonances are observed. Among these, two new resonances, N(2300) and N(2570) are significant, one 1/2+ resonance with a mass of 2300-30-0+40+109 MeV/c2 and width of 340-30-58+30+110 MeV/c2, and one 5/2 - resonance with a mass of 2570-10-10+19+34 MeV/c2 and width of 250-24-21+14+69 MeV/c2. For the remaining 5 N* intermediate resonances [N(1440), N(1520), N(1535), N(1650) and N(1720)], the analysis yields mass and width values that are consistent with those from established resonances.

Original languageEnglish (US)
Article number022001
JournalPhysical review letters
Volume110
Issue number2
DOIs
StatePublished - Jan 11 2013

Bibliographical note

Publisher Copyright:
© 2013 American Physical Society

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