Abstract
We report on a search for the recently reported X(3872) state using 15.1 fb -1 of e + e - data taken in the √s = 9.46-11.30 GeV region. Separate searches for the production of the X(3872) in untagged γγ fusion and e +e - annihilation following initial state radiation are made by taking advantage of the unique angular correlation between the leptons from the decay J/ψ → l + l - in X(3872) decay to π + π - J/ψ. No signals are observed in either case, and 90% confidence upper limits are established as (2J + 1)Γ γγ(X(3872))B(X → π + π - J/ψ) < 12.9 eV and Γ ee(X(3872))B(X → π + π - J/ψ)< 8.3 eV.
| Original language | English (US) |
|---|---|
| Article number | 032004 |
| Journal | Physical review letters |
| Volume | 94 |
| Issue number | 3 |
| DOIs | |
| State | Published - Jan 28 2005 |
| Externally published | Yes |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy
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