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ISSN - 00319007, EISSN - 10797114, Physical Review Letters, 2013, vol. 110, p. -

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

Ablikim M., Achasov M. N., Ambrose D. J., An F. F., An Q., An Z. H., Bai J. Z., Ban Y., Becker J., Berger N., Bertani M., Bian J. M., Boger E., Bondarenko O., Boyko I., Briere R. A., Bytev V., Cai X., Calcaterra A., Cao G. F., Chang J. F., Chelkov G., Chen G., Chen H. S., Chen J. C., Chen M. L., Chen S. J., Chen Y., Chen Y. B., Cheng H. P., Chu Y. P., Cronin-Hennessy D., Dai H. L., Dai J. P., Dedovich D., Deng Z. Y., Denig A., Denysenko I., Destefanis M., Ding W. M., Ding Y., Dong L. Y., Dong M. Y., Du S. X., Fang J., Fang S. S., Fava L., Feldbauer F., Feng C. Q., Ferroli R. B., Fu C. D., Fu J. L., Gao Y., Geng C., Goetzen K., Gong W. X., Gradl W., Greco M., Gu M. H., Gu Y. T., Guan Y. H., Guo A. Q., Guo L. B., Guo Y. P., Han Y. L., Hao X. Q., Harris F. A., He K. L., He M., He Z. Y., Held T., Heng Y. K., Hou Z. L., Hu H. M., Hu J. F., Hu T., Huang B., Huang G. M., Huang J. S., Huang X. T., Huang Y. P., Hussain T., Ji C. S., Ji Q., Ji X. B., Ji X. L., Jia L. K., Jiang L. L., Jiang X. S., Jiao J. B., Jiao Z., Jin D. P., Jin S., Jing F. F., Kalantar-Nayestanaki N., Kavatsyuk M., Kühn W.

© 2013 American Physical Society 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<sup>-</sup>4. In this decay, 7 N<sup>*</sup> intermediate resonances are observed. Among these, two new resonances, N(2300) and N(2570) are significant, one 1/2<sup>+</sup> 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 <sup>-</sup> 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<sup>*</sup> 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.