Using an e+e− collision data sample of (27.08 pm 0.14)x10^8 ψ(3686) events collected by the BESIII detector, we report the first observation of χcJ → Ω−Ω ̄ + (J = 0, 1, 2) decays with significances of 5.6σ, 6.4σ, and 18σ, respectively, where the χcJ mesons are produced in the radiative ψ(3686) decays. The branching fractions are determined to be B(χc0 → Ω−Ω ̄ +) = (3.51 pm 0.54 pm 0.29) × 10−5, B(χc1 → Ω−Ω ̄ +) = (1.49 pm 0.23 pm 0.10) × 10−5, and B(χc2 → Ω−Ω ̄ +) = (4.52 pm 0.24 pm 0.18) × 10−5, where the first and second uncertainties are statistical and systematic, respectively.
Observation of the decay χcJ →Ω−Ω ̄+
Garzia I.;Scodeggio M.;
2023
Abstract
Using an e+e− collision data sample of (27.08 pm 0.14)x10^8 ψ(3686) events collected by the BESIII detector, we report the first observation of χcJ → Ω−Ω ̄ + (J = 0, 1, 2) decays with significances of 5.6σ, 6.4σ, and 18σ, respectively, where the χcJ mesons are produced in the radiative ψ(3686) decays. The branching fractions are determined to be B(χc0 → Ω−Ω ̄ +) = (3.51 pm 0.54 pm 0.29) × 10−5, B(χc1 → Ω−Ω ̄ +) = (1.49 pm 0.23 pm 0.10) × 10−5, and B(χc2 → Ω−Ω ̄ +) = (4.52 pm 0.24 pm 0.18) × 10−5, where the first and second uncertainties are statistical and systematic, respectively.File in questo prodotto:
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