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Observation of a broad 1-- resonant structure around 1.5 GeV/c2 in the K+K- mass spectrum in J/psi-->K+K-pi0 |
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| Authors: | Ablikim M Bai J Z Ban Y Cai X Chen H F Chen H S Chen H X Chen J C Chen Jin Chen Y B Chi S P Chu Y P Cui X Z Dai Y S Deng Z Y Dong L Y Dong Q F Du S X Du Z Z Fang J Fang S S Fu C D Gao C S Gao Y N Gu S D Gu Y T Guo Y N Guo Y Q Guo Z J Harris F A He K L He M Heng Y K Hu H M Hu T Huang G S Huang X P Huang X T Ji X B Jiang X S Jiao J B Jin D P Jin S Jin Yi Lai Y F Li 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 Liang Y F Liao H B Liu 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 Lu F Lu G R Lu H J Lu J G Luo C L Ma F C Ma H L Ma L L Ma Q M |
| Affiliation: | Institute of High Energy Physics, Beijing 100049, People's Republic of China. |
| 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. |
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