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research article
Observation of e+e-→K+K-J/ψ via initial-state radiation at Belle
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 673fb-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-)<1.2eV/c2 at a 90% confidence level. We also find evidence for e+e-→KS0KS0J/ψ in the same data sample. © 2008 The American Physical Society.
Type
research article
Web of Science ID
WOS:000252863700005
Scopus ID
2-s2.0-38349088372
Authors
Yuan, C.Z.
•
Shen, C.P.
•
Wang, P.
•
Wang, X.L.
•
Adachi, I.
•
Aihara, H.
•
Arinstein, K.
•
Aulchenko, V.
•
Aushev, T.
•
Bakich, A.M.
Publication date
2008
Volume
77
Issue
1
Article Number
011105
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
November 5, 2010
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