Using 586pb⊃-1 of e⊃+e⊃- collision data at E c.m.=4170MeV, produced at the Cornell Electron Storage Ring collider and collected with the CLEO-c detector, we observe the process e⊃+e⊃-→π⊃+π⊃-hc(1P). We measure its cross section to be 15.6±2.3±1.9±3.0pb, where the third error is due to the external uncertainty on the branching fraction of ψ(2S)→π0hc(1P), which we use for normalization. We also find evidence for e⊃+e⊃-→ηhc(1P) at 4170 MeV at the 3σ level and see hints of a rise in the e⊃+e⊃- →π⊃+π⊃-hc(1P) cross section at 4260 MeV.
ASJC Scopus subject areas
- Physics and Astronomy(all)