Observation of e+e- to K+K-J/psi via Initial State Radiation at Belle

Details Observation of e+e- to K+K-J/psi via Initial State Radiation at Belle Observation of e+e- to K+K-J/psi via Initial State Radiation at Belle

2007-09-17

arxiv.org/abs/0709.2565v2

Phys.Rev.D77:011105,2008

Physics

High Energy Physics

High Energy Physics - Experiment

Version to appear in Physical Review D (RC)

Scientific paper

10.1103/PhysRevD.77.011105

The process e+e- to K+K-J/psi is observed for the first time via initial
state radiation. The cross section of e+e- to K+K-J/psi 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 Upsilon(4S) resonance. We also
find evidence for e+e- to K_S K_S J/psi in the same energy region.

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