Study ofψdecays to theΞ−Ξ¯+and

Study of J/ψ and ψ(3686) decay to ΛAblikim1, Ачасов2, Ahmed3 et al. 2017Phys. Rev. DSelf Cite

“…Reviews of the theoretical and experimental results [4] conclude that the current theoretical understanding, especially for the ψ decays into baryon-antibaryon pair final states, is not mature. The branching fractions of ψ decays into BB (BB refers to both ΛΛ and Σ 0Σ0 throughout the text) final states from different experiments [5][6][7][8][9][10][11][12][13][14] and the Particle Data Group (PDG) [15] averages are summarized in Table I. Obvious differences between the different experiments are observed, and the uncertainties are relatively large.…”

Polarization observables in e+e− annihilation to a baryon-antibaryon pair

“…ΛΛ 440675 ± 670 19.43 ± 0.03 ± 0.33 ψ(2S) → ΛΛ 31119 ± 187 3.97 ± 0.02 ± 0.12 J/ψ → Σ 0Σ0 111026 ± 335 11.64 ± 0.04 ± 0.23 ψ(2S) → Σ 0Σ0 6612 ± 82 2.44 ± 0.03 ± 0.11 J/ψ → Σ(1385) 0Σ (1385) 0 102762 ± 852 10.71 ± 0.09 J/ψ → Ξ 0Ξ0 134846 ± 437 11.65 ± 0.04 ψ(2S) → Σ(1385) 0Σ (1385) 0 2214 ± 148 0.69 ± 0.05 ψ(2S) → Ξ 0Ξ0 10839 ± 123 2.73 ± 0.03 J/ψ → Ξ −Ξ+ 42811 ± 231 10.40 ± 0.06 J/ψ → Σ(1385) −Σ (1385) + 42595 ± 467 10.96 ± 0.12 J/ψ → Σ(1385) +Σ (1385) − 52523 ± 596 12.58 ± 0.14 ψ(2S) → Ξ −Ξ+ 5337 ± 83 2.78 ± 0.05 ψ(2S) → Σ(1385) −Σ (1385) + 1375 ± 98 0.85 ± 0.06 ψ(2S) → Σ(1385) +Σ (1385) − 1470 ± 95 0.84 ± 0.05 TABLE I. Available B1B2 data samples and the branching fractions from recent BESIII publications[11][12][13].…”

Study of decay $\psi(1S,2S) \rightarrow$ baryon pairs at BESIII

“…2. All the angular parameter α and branching fractions for the corresponding decays are measured for the first time except that the branching fraction for J/ψ(ψ(3686)) → Ξ −Ξ+ decay is measured with improved precision [21]. Based on the measured branching fractions, the "12% rule" for the corresponding decays are determined to be: B(J/ψ→Ξ − Ξ + ) B(ψ(3686)→Ξ − Ξ + ) = (26.73±0.50±2.30)%, B(J/ψ→Σ(1385) +Σ (1385) − ) B(ψ(3686)→Σ(1385) +Σ (1385) − ) = (7.76 ± 0.55 ± 0.68)% and B(J/ψ→Σ(1385) −Σ (1385) + ) B(ψ(3686)→Σ(1385) −Σ (1385) + ) = (6.68 ± 0.40 ± 0.50)%, respectively.…”

“…Using (1310.6 ± 7.0) × 10 6 J/ψ and (447.9 ± 2.9) × 10 6 ψ(3686) events, the preliminary results of branching fractions and the angular distributions for J/ψ(ψ(3686)) → Σ(1385) 0Σ (1385) 0 and Ξ 0Ξ0 are measured with the same single baryon tag method applied as described in [21], and the fit results are shown in Fig. 3.…”