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Observation of e^+e^- → K^+K^-J/Ψ via initial-state radiation at Belle (2008)

Abstract
The process e^+e^- →K^+K^-J/Ψ is observed for the first time via initial-state radiation. The cross section of e^+e^- → K^+K^-J/Ψ for center-of-mass energies between threshold and 6.0 GeV is measured using 673 fb^{-1} of data collected with the Belle detector on and off the Υ(4S) resonance. No significant signal for Y(4260)→ K^+K^-J/Ψ is observed, and we determine B(Y(4260)→ K^+K^-J/Ψ)Γ(Y(4260)→ e^+e^-). PHYSICAL REVIEW D. v.77, n.1, 2008, p.011105-1-011105-6

Publication details
Download http://dx.doi.org/10.1103/PhysRevD.77.011105
http://hdl.handle.net/2237/11349
Publisher American Physical Society
Repository AKF OAI-PMH Repository (Japan)
Keywords 000
Type 研究成果-論文以外
Language eng