Abstract
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.
Original language | English (US) |
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Article number | 041803 |
Journal | Physical review letters |
Volume | 107 |
Issue number | 4 |
DOIs | |
State | Published - Jul 20 2011 |
Funding
ASJC Scopus subject areas
- General Physics and Astronomy