Abstract
From e+e- collision data acquired with the CLEO detector at the Cornell Electron Storage Ring, we observe the non-DD̄ decay ψ(3770) →γχc1 with a statistical significance of 6.6 standard deviations, using the two-photon cascades to J/ψ and J/ψ→+-. We determine σ(e+e-→ψ(3770))×B(ψ(3770)→γχc1)=(18. 0±3.3±2.5)pb and branching fraction B(ψ(3770) →γχc1)=(2.8±0.5±0.4)×10-3. We set 90% C.L. upper limits for the transition to χc2 (χc0): σ×B<5.7pb (<282pb) and B<0.9×10-3 (<44×10-3). We also determine Γ(ψ(3770)→γχc1)/Γ(ψ(3770)→π+π-J/ ψ)=1.5±0.3±0.3 (>1.0 at 90% C.L.), which bears upon the interpretation of X(3872).
| Original language | English (US) |
|---|---|
| Article number | 182002 |
| Journal | Physical review letters |
| Volume | 96 |
| Issue number | 18 |
| DOIs | |
| State | Published - 2006 |
| Externally published | Yes |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy
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