BESIII reports 4.4σ evidence for transverse Ξ⁰ polarization in ψ(3686)→Ξ⁰Ξ⁰-bar together with improved measurements of branching fraction, decay amplitudes, and CP observables consistent with no violation.
Ablikimet al.(BESIII Collaboration), JHEP10, 081 (2023) [erratum: JHEP12, 080 (2023)]
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Evidence of transverse polarization of $\Xi^0$ hyperon in $\psi(3686)\rightarrow\Xi^0\bar{\Xi}^0$
BESIII reports 4.4σ evidence for transverse Ξ⁰ polarization in ψ(3686)→Ξ⁰Ξ⁰-bar together with improved measurements of branching fraction, decay amplitudes, and CP observables consistent with no violation.