Role of Ξ (1690) in the J/ψ → Ξ ⁰Λ ̄K⁰ reaction

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Key Points

The study aims to assess the contributions of the Xi(1690), Lambda(1890), and Lambda(1830) resonances to the J/Psi decay process.
Utilized the chiral unitary approach to dynamically generate Xi(1690) from S-wave pseudoscalar meson-baryon interactions.
Evaluated invariant mass distributions of various decay products including Xi0, Lambda bar, and K0.
Applied the parametric bootstrap method to assess theoretical uncertainties.
The Xi(1690) resonance significantly influences the J/Psi decay process, contradicting previous experimental neglect.
Providing a solid theoretical model that accurately describes invariant mass distributions.
Future measurements could further clarify the properties of the Xi(1690) resonance.

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Theoretical analysis explores the Xi(1690) resonance's impact on decay processes in particle physics, suggesting its significance.

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Lyu et al. (2026) studied this question.

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