Observation of a broad 1-- resonant structure around 1.5 GeV/c2 in the K+K- mass spectrum in J/psi-->K+K-pi0

M Ablikim; J Z Bai; Y Ban; X Cai; H F Chen; H S Chen; H X Chen; J C Chen; Jin Chen; Y B Chen; S P Chi; Y P Chu; X Z Cui; Y S Dai; Z Y Deng; L Y Dong; Q F Dong; S X Du; Z Z Du; J Fang; S S Fang; C D Fu; C S Gao; Y N Gao; S D Gu; Y T Gu; Y N Guo; Y Q Guo; Z J Guo; F A Harris; K L He; M He; Y K Heng; H M Hu; T Hu; G S Huang; X P Huang; X T Huang; X B Ji; X S Jiang; J B Jiao; D P Jin; S Jin; Yi Jin; Y F Lai; G Li; H B Li; H H Li; J Li; R Y Li; S M Li; W D Li; W G Li; X L Li; X Q Li; Y L Li; Y F Liang; H B Liao; C X Liu; F Liu; Fang Liu; H H Liu; H M Liu; J Liu; J B Liu; J P Liu; R G Liu; Z A Liu; F Lu; G R Lu; H J Lu; J G Lu; C L Luo; F C Ma; H L Ma; L L Ma; Q M Ma; X B Ma; Z P Mao; X H Mo; J Nie; S L Olsen; H P Peng; N D Qi; H Qin; J F Qiu; Z Y Ren; G Rong; L Y Shan; L Shang; D L Shen; X Y Shen; H Y Sheng; F Shi; X Shi; H S Sun; J F Sun; S S Sun; Y Z Sun; Z J Sun; Z Q Tan; X Tang; Y R Tian; G L Tong; G S Varner; D Y Wang; L Wang; L S Wang; M Wang; P Wang; P L Wang; W F Wang; Y F Wang; Z Wang; Z Y Wang; Zhe Wang; Zheng Wang; C L Wei; D H Wei; N Wu; X M Xia; X X Xie; B Xin; G F Xu; Y Xu; M L Yan; F Yang; H X Yang; J Yang; Y X Yang; M H Ye; Y X Ye; Z Y Yi; G W Yu; C Z Yuan; J M Yuan; Y Yuan; S L Zang; Y Zeng; Yu Zeng; B X Zhang; B Y Zhang; C C Zhang; D H Zhang; H Y Zhang; J W Zhang; J Y Zhang; Q J Zhang; X M Zhang; X Y Zhang; Y Y Zhang; Z P Zhang; Z Q Zhang; D X Zhao; J W Zhao; M G Zhao; P P Zhao; W R Zhao; Z G Zhao; H Q Zheng; J P Zheng; Z P Zheng; L Zhou; N F Zhou; K J Zhu; Q M Zhu; Y C Zhu; Yingchun Zhu; Y S Zhu; Z A Zhu; B A Zhuang; X A Zhuang; B S Zou; BES Collaboration

doi:10.1103/PhysRevLett.97.142002

Observation of a broad 1-- resonant structure around 1.5 GeV/c2 in the K+K- mass spectrum in J/psi-->K+K-pi0

Phys Rev Lett. 2006 Oct 6;97(14):142002. doi: 10.1103/PhysRevLett.97.142002. Epub 2006 Oct 6.

Authors

M Ablikim¹, J Z Bai, Y Ban, X Cai, H F Chen, H S Chen, H X Chen, J C Chen, Jin Chen, Y B Chen, S P Chi, Y P Chu, X Z Cui, Y S Dai, Z Y Deng, L Y Dong, Q F Dong, S X Du, Z Z Du, J Fang, S S Fang, C D Fu, C S Gao, Y N Gao, S D Gu, Y T Gu, Y N Guo, Y Q Guo, Z J Guo, F A Harris, K L He, M He, Y K Heng, H M Hu, T Hu, G S Huang, X P Huang, X T Huang, X B Ji, X S Jiang, J B Jiao, D P Jin, S Jin, Yi Jin, Y F Lai, G Li, H B Li, H H Li, J Li, R Y Li, S M Li, W D Li, W G Li, X L Li, X Q Li, Y L Li, Y F Liang, H B Liao, C X Liu, F Liu, Fang Liu, H H Liu, H M Liu, J Liu, J B Liu, J P Liu, R G Liu, Z A Liu, F Lu, G R Lu, H J Lu, J G Lu, C L Luo, F C Ma, H L Ma, L L Ma, Q M Ma, X B Ma, Z P Mao, X H Mo, J Nie, S L Olsen, H P Peng, N D Qi, H Qin, J F Qiu, Z Y Ren, G Rong, L Y Shan, L Shang, D L Shen, X Y Shen, H Y Sheng, F Shi, X Shi, H S Sun, J F Sun, S S Sun, Y Z Sun, Z J Sun, Z Q Tan, X Tang, Y R Tian, G L Tong, G S Varner, D Y Wang, L Wang, L S Wang, M Wang, P Wang, P L Wang, W F Wang, Y F Wang, Z Wang, Z Y Wang, Zhe Wang, Zheng Wang, C L Wei, D H Wei, N Wu, X M Xia, X X Xie, B Xin, G F Xu, Y Xu, M L Yan, F Yang, H X Yang, J Yang, Y X Yang, M H Ye, Y X Ye, Z Y Yi, G W Yu, C Z Yuan, J M Yuan, Y Yuan, S L Zang, Y Zeng, Yu Zeng, B X Zhang, B Y Zhang, C C Zhang, D H Zhang, H Y Zhang, J W Zhang, J Y Zhang, Q J Zhang, X M Zhang, X Y Zhang, Y Y Zhang, Z P Zhang, Z Q Zhang, D X Zhao, J W Zhao, M G Zhao, P P Zhao, W R Zhao, Z G Zhao, H Q Zheng, J P Zheng, Z P Zheng, L Zhou, N F Zhou, K J Zhu, Q M Zhu, Y C Zhu, Yingchun Zhu, Y S Zhu, Z A Zhu, B A Zhuang, X A Zhuang, B S Zou; BES Collaboration

Affiliation

¹ Institute of High Energy Physics, Beijing 100049, People's Republic of China.

PMID: 17155241
DOI: 10.1103/PhysRevLett.97.142002

Abstract

A broad peak is observed at low K+K- invariant mass in J/psi-->K+K-pi(0) decays found in a sample of 5.8x10(7) J/psi events collected with the BESII detector. The statistical significance of the broad resonance is much larger than 5sigma. A partial wave analysis shows that the J;{PC} of this structure is 1--. Its pole position is determined to be [1576(-55)(+49)(stat)-91+98(syst)] MeV/c(2)-i/2[818(-23)(+22)(stat)-133+64(syst)] MeV/c(2). These parameters are not compatible with any known meson resonances.