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Observation of Ξ- Hyperon transverse polarization in ψ (3686) → Ξ-Ξ¯

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  • معلومة اضافية
    • Contributors:
      M. Ablikim; M.???N. Achasov; P. Adlarson; M. Albrecht; R. Aliberti; A. Amoroso; M.???R. An; Q. An; X.???H. Bai; Y. Bai; O. Bakina; R. Baldini Ferroli; I. Balossino; Y. Ban; V. Batozskaya; D. Becker; K. Begzsuren; N. Berger; M. Bertani; D. Bettoni; F. Bianchi; J. Blom; A. Bortone; I. Boyko; R.???A. Briere; A. Brueggemann; H. Cai; X. Cai; A. Calcaterra; G.???F. Cao; N. Cao; S.???A. Cetin; J.???F. Chang; W.???L. Chang; G. Chelkov; C. Chen; G. Chen; H.???S. Chen; M.???L. Chen; S.???J. Chen; T. Chen; X.???R. Chen; X.???T. Chen; Y.???B. Chen; Z.???J. Chen; W.???S. Cheng; X. Chu; G. Cibinetto; F. Cossio; J.???J. Cui; H.???L. Dai; J.???P. Dai; A. Dbeyssi; R.???E. de Boer; D. Dedovich; Z.???Y. Deng; A. Denig; I. Denysenko; M. Destefani; F. De Mori; Y. Ding; J. Dong; L.???Y. Dong; M.???Y. Dong; X. Dong; S.???X. Du; P. Egorov; Y.???L. Fan; J. Fang; S.???S. Fang; W.???X. Fang; Y. Fang; R. Farinelli; L. Fava; F. Feldbauer; G. Felici; C.???Q. Feng; J.???H. Feng; K. Fischer; M. Fritsch; C. Fritzsch; C.???D. Fu; H. Gao; Y.???N. Gao; Yang Gao; S. Garbolino; I. Garzia; P.???T. Ge; Z.???W. Ge; C. Geng; E.???M. Gersabeck; A. Gilman; K. Goetzen; L. Gong; W.???X. Gong; W. Gradl; M. Greco; L.???M. Gu; M.???H. Gu; Y.???T. Gu
    • الموضوع:
      2022
    • Collection:
      Università degli studi di Torino: AperTo (Archivio Istituzionale ad Accesso Aperto)
    • نبذة مختصرة :
      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.
    • Relation:
      volume:106; issue:9; firstpage:L091101-1; lastpage:L091101-9; numberofpages:9; journal:PHYSICAL REVIEW D; https://hdl.handle.net/2318/1891372; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85144170632; https://journals.aps.org/prd/abstract/10.1103/PhysRevD.106.L091101
    • الرقم المعرف:
      10.1103/physrevd.106.l091101
    • الرقم المعرف:
      10.1103/PhysRevD.106.L091101
    • Rights:
      info:eu-repo/semantics/openAccess
    • الرقم المعرف:
      edsbas.7250B259