@article{8e9ce9bf73794027a15897ec92251230,
title = "Observation of Ξ- Hyperon transverse polarization in ψ (3686) → Ξ-Ξ¯",
abstract = "Using a sample of (448.1±2.9)×106 ψ(3686) decays collected with the BESIII detector at BEPCII, we report an observation of Ξ- transverse polarization with a significance of 7.3σ in the decay ψ(3686)→Ξ-Ξ¯+ (Ξ-→Λπ-, Ξ¯+→Λ¯π+, Λ→pπ-, Λ¯→p¯π+). The relative phase of the electric and magnetic form factors is determined to be Δφ=(0.667±0.111±0.058) rad. This is the first measurement of the relative phase for a ψ(3686) decay into a pair of Ξ-Ξ¯+ hyperons. The Ξ- decay parameters (αΞ-, φΞ-) and their conjugates (αΞ¯+, φΞ¯+), the angular-distribution parameter αψ, and the strong-phase difference δp-δs for Λπ- scattering are measured to be consistent with previous BESIII results.",
author = "{BESIII Collaboration} and M. Ablikim and Achasov, {M. N.} and P. Adlarson and M. Albrecht and R. Aliberti and A. Amoroso and An, {M. R.} and Q. An and Bai, {X. H.} and Y. Bai and O. Bakina and {Baldini Ferroli}, R. and I. Balossino and Y. Ban and V. Batozskaya and D. Becker and K. Begzsuren and N. Berger and M. Bertani and D. Bettoni and F. Bianchi and J. Bloms and A. Bortone and I. Boyko and Briere, {R. A.} and A. Brueggemann and H. Cai and X. Cai and A. Calcaterra and Cao, {G. F.} and N. Cao and Cetin, {S. A.} and Chang, {J. F.} and Chang, {W. L.} and G. Chelkov and C. Chen and G. Chen and Chen, {H. S.} and Chen, {M. L.} and Chen, {S. J.} and Chen, {X. T.} and Chen, {X. R.} and Chen, {X. T.} and Chen, {Y. B.} and Chen, {Z. J.} and Cheng, {W. S.} and X. Chu and G. Cibinetto and Muchnoi, {N. Yu} and Nikolaev, {I. B.}",
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 R&D Program of China under Contracts No. 2020YFA0406400, No. 2020YFA0406300; National Natural Science Foundation of China (NSFC) under Contracts No. 12075107, No. 11625523, No. 11635010, No. 11735014, No. 11822506, No. 11835012, No. 11905236, No. 11935015, No. 11935016, No. 11935018, No. 11961141012, No. 12047501, No. 12022510, No. 12025502, No. 12035009, No. 12035013, No. 12061131003 and No. 12225509; 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; Institute of Nuclear and Particle Physics, Astronomy and Cosmology (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 2149; 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; Lundstr{\"o}m-mans Foundation; STFC (United Kingdom); The Knut and Alice Wallenberg Foundation (Sweden) under Contract No. 2016.0157; The Royal Society, (United Kingdom) under Contracts No. DH140054 and No. DH160214; The Swedish Research Council; Polish National Science Centre under Contract No. 2019/35/O/ST2/02907; U.S. Department of Energy under Contracts No. DE-FG02-05ER41374 and No. DE-SC-0012069. Publisher Copyright: {\textcopyright} 2022 authors. Published by the American Physical Society.",
year = "2022",
month = nov,
day = "1",
doi = "10.1103/PhysRevD.106.L091101",
language = "English",
volume = "106",
journal = "Physical Review D",
issn = "2470-0010",
publisher = "AMER PHYSICAL SOC",
number = "9",
}