Observation of ψ (3686) → Ξ (1530)0 Ξ ¯ (1530)0 and Ξ (1530)0 Ξ ¯ 0 OBSERVATION of ... M. ABLIKIM et al.

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Abstract

Using (448.1±2.9)×106 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 and Ξ(1530)0Ξ¯0. 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)0 is determined to be α=0.32±0.19±0.07, in agreement with theoretical predictions within one standard deviation.

Original languageEnglish (US)
Article number092012
JournalPhysical Review D
Volume104
Issue number9
DOIs
StatePublished - Nov 1 2021

Bibliographical note

Funding Information:
The BESIII collaboration thanks the staff of BEPCII and the IHEP computing center for their strong support. This work is supported in part by National Key Basic Research Program of China under Contracts No. 2020YFA0406300 and No. 2020YFA0406400; National Natural Science Foundation of China (NSFC) under Contracts No. 11605042, No. 11625523, No. 11635010, No. 11735014, No. 11822506, No. 11835012, No. 11875122, No. 11935015, No. 11935016, No. 11935018, No. 11905236, No. 11961141012, No. 12022510, No. 12025502, No. 12035009, No. 12035013, No. 12047501, No. 12075107, and No. 12061131003; the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; Joint Large-Scale Scientific Facility Funds of the NSFC and CAS under Contracts No. U1732263, and No. U1832207; CAS Key Research Program of Frontier Sciences under Contract No. QYZDJ-SSW-SLH040; 100 Talents Program of CAS; INPAC and Shanghai Key Laboratory for Particle Physics and Cosmology; ERC under Contract No. 758462; European Union Horizon 2020 research and innovation programme under Contract No. Marie Sklodowska-Curie Grant Agreement No. 894790; German Research Foundation DFG under Contract No. 443159800, Collaborative Research Center CRC 1044, FOR 2359, GRK 214; Istituto Nazionale di Fisica Nucleare, Italy; Ministry of Development of Turkey under Contract No. DPT2006K-120470; National Science and Technology fund; Olle Engkvist Foundation under Contract No. 200-0605; STFC (United Kingdom); The Knut and Alice Wallenberg Foundation (Sweden) under Contract No. 2016.0157; The Royal Society, UK under Contracts No. DH140054, and No. DH160214; The Swedish Research Council; U.S. Department of Energy under Contracts No. DE-FG02-05ER41374, and No. DE-SC-0012069; Excellent Youth Foundation of Henan Province under Contract No. 212300410010; The youth talent support program of Henan Province under Contract No. ZYQR201912178; Program for Innovative Research Team in University of Henan Province under Contract No. 19IRTSTHN018; The Fundamental Research Funds for the Central Universities under Grant No. lzujbky-2021-sp24.

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