Observation of ψ(3686)→Ξ(1530)0Ξ(1530)0bar and Ξ(1530)0Ξ0bar
Observation of ψ(3686)→Ξ(1530)0Ξ(1530)0bar and Ξ(1530)0Ξ0bar
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观察 Ï(3686)–Î(1530)0Î(1530)0bar 和 Î(1530)0Î0bar
DOI：
10.1103/physrevd.104.092012
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发表时间：
2021
影响因子：
5
通讯作者：
Briere R.
中科院分区：
文献类型：
--
作者：
Ablikim M.;Achasov M. N.;Adlarson P.;Ahmed S.;Albrecht M.;Aliberti R.;Amoroso A.;An M. R.;An Q.;Bai X. H.;Bai Y.;Bakina O.;Ferroli R. Baldini;Balossino I;Ban Y.;Begzsuren K.;Berger N.;Bertani M.;Bettoni D.;Bianchi F.;Bloms J.;Bortone A.;Boyko I;Briere R.
Using (448.1±2.9)×10^6 ψ(3686) events collected with the BESIII detector and a single-baryon tagging technique, we present the first observation of the decays .ψ(3686)→Ξ(1530)^0Ξ(1530)^0-bar and Ξ(1530)^0Ξ^0-bar. The branching fractions are measured to be .B(ψ(3686)→Ξ(1530)^0Ξ(1530)^0)=(6.77±0.14±0.39)×10^-5 and B(ψ(3686)→Ξ(1530)^0Ξ^0)=(0.53±0.04±0.03)×10^-5. Here, the first and second uncertainties are statistical and systematic, respectively. In addition, the parameter associated with the angular distribution for the decay .ψ(3686)→Ξ(1530)^0Ξ(1530)^0bar is determined to be α=0.32 ± 0.19 ± 0.07, in agreement with theoretical predictions within one standard deviation.
