Study of $\psi$ decays to the $\Xi^{-}\bar\Xi^{+}$ and $\Sigma(1385)^{\mp}\bar\Sigma(1385)^{\pm}$ final states

We study the decays of the charmonium resonances J/ψ and ψ(3686) to the final states Ξ-Ξ¯+, Σ(1385)∓Σ¯(1385)± based on a single baryon tag method using data samples of (223.7±1.4)×106 J/ψ and (106.4±0.9)×106 ψ(3686) events collected with the BESIII detector at the BEPCII collider. The decay ψ(3686)→Σ(1385)∓Σ¯(1385)± is observed for the first time, and the measurements of the other processes, including the branching fractions and angular distributions, are in good agreement with, and much more precise than, the previously published results. Additionally, the ratios B(ψ(3686)→Ξ-Ξ¯+)B(J/ψ→Ξ-Ξ¯+), B(ψ(3686)→Σ(1385)-Σ¯(1385)+)B(J/ψ→Σ(1385)-Σ¯(1385)+) and B(ψ(3686)→Σ(1385)+Σ¯(1385)-)B(J/ψ→Σ(1385)+Σ¯(1385)-) are determined.

Note:

10 pages, 9 figures, 5 tables. This version is consistent with paper published in Phys. Rev. D on 04 Apr 2016

electron positron: annihilation
charmonium: hadronic decay
J/psi(3100): hadronic decay
psi(3685): hadronic decay
Xi: pair production
Sigma(1385): pair production
angular distribution
J/psi(3100): branching ratio
psi(3685): branching ratio
branching ratio: ratio: measured

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Study of ψ\psiψ decays to the Ξ−Ξˉ+\Xi^{-}\bar\Xi^{+}Ξ−Ξˉ+ and Σ(1385)∓Σˉ(1385)±\Sigma(1385)^{\mp}\bar\Sigma(1385)^{\pm}Σ(1385)∓Σˉ(1385)± final states

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Study of $\psi$ decays to the $\Xi^{-}\bar\Xi^{+}$ and $\Sigma(1385)^{\mp}\bar\Sigma(1385)^{\pm}$ final states