Observation of a Broad 1{sup --} Resonant Structure around 1.5 GeV/c{sup 2} in the K{sup +}K{sup -} Mass Spectrum in J/{psi}{yields}K{sup +}K{sup -}{pi}{sup 0}

Journal Article · Fri Oct 06 00:00:00 EDT 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.97.142002· OSTI ID:20860908

Ablikim, M; Bai, J Z; Cai, X; Chen, H S; Chen, H X; Chen, J C; Chen, Jin; Chen, Y B; Chu, Y P; Cui, X Z; Deng, Z Y; Dong, L Y; Du, S X; Du, Z Z; Fang, J; Fu, C D; Gao, C S; Gu, S D; Guo, Y N; Guo, Y Q ^[1]

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1. Institute of High Energy Physics, Beijing 100049 (China)

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

• OSTI ID: 20860908
• Journal Information: Physical Review Letters, Vol. 97, Issue 14; Other Information: DOI: 10.1103/PhysRevLett.97.142002; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

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