The resonance parameters of χ c0, the 31P0 resonance of charmonium, have been measured at the Fermilab Antiproton Accumulator by means of the reaction pp → χc0 → γ J/ψ → γ (e+, e-. The results are M(ψc0) = 3417.4+1.8-1.9 ± 0.2 Me V/c2, Τ(03C8;c0 → pp) × B(ψc0 → J/Ψ γ) × B(J/ψ → e+e−) = 2.89+ 0.67- 0.53 ± 0.14 eV. Using known branching ratios we also obtain Τ (Χc0 → pp) = 8.0+1.9+3.5-1.5-1.9keV. These results are discussed in relation to the other ΧCJ states and to theoretical predictions.
|Original language||English (US)|
|Number of pages||4|
|Journal||Physical review letters|
|State||Published - 1999|
ASJC Scopus subject areas
- Physics and Astronomy(all)