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Bell nonlocality and entanglement in $e^{+}e^{-} \rightarrow Y\bar{Y}$ at BESIII

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arxiv 2406.16298 v2 pith:Z3OSSE6V submitted 2024-06-24 hep-ph quant-ph

classification hep-phquant-ph
keywords nonlocalityentanglementhyperon-antihyperonsystemsquantumbellbesiiicorrelations
verification ladder T0 review T1 audit T2 compute T3 formal

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abstract

The Bell nonlocality and entanglement are two kinds of quantum correlations in quantum systems. Due to the recent upgrade in Beijing Spectrometer III (BESIII) experiment, it is possible to explore the nonlocality and entanglement in hyperon-antihyperon systems produced in electron-positron annihilation with high precision data. We provide a systematic method for studying quantum correlations in spin-1/2 hyperon-antihyperon systems through the measures for the nonlocality and entanglement. We find that with nonvanishing polarizations of the hyperon and its antihyperon, the kinematic region of nonlocality in the hyperon-antihyperon system is more restricted than the $\tau^{+}\tau^{-}$ system in which polarizations of $\tau$ leptons are vanishing. We also present an experimental proposal to probe the nonlocality and entanglement in hyperon-antihyperon systems at BSEIII.

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Cited by 10 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Probing Spin and Lifetime Correlations in Entangled Hyperon-AntiHyperon Pairs

    nucl-ex 2025-07 conditional novelty 7.0 of 10

    A proposal to search for correlations in the decay times of entangled Lambda-AntiLambda pairs using spin-angle and time-difference observables.

  2. High Energy Photon Polarimetry at Lepton Colliders: Quantum Information from Converted Photons

    hep-ph 2026-07 conditional novelty 6.5 of 10

    Converted photons in Belle II enable high-significance measurements of Bell nonlocality, discord, concurrence, magic and steerability for macroscopically separated GeV diphotons, provided opening-angle resolution reac...

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    Weak decays of spin-1/2 baryon-antibaryon pairs into a spin-1/2 baryon and a spin-0 meson can probabilistically increase the pair's spin entanglement, with the effect controlled by the decay asymmetry parameter alphaD.

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    In e+e−→ψ→Ξ(→Λπ)Ξ̄(→Λ̄π), the ΛΛ̄ pair's concurrence and negativity can decrease relative to the mother pair yet stay nonzero except at θ=0 and π, while quantum discord can always increase.

  8. Manipulating Bell nonlocality and entanglement in polarized electron-positron annihilation

    hep-ph 2026-02 conditional novelty 5.0 of 10

    Polarized lepton beams can tune hyperon-antihyperon entanglement and Bell nonlocality, with transverse polarization capable of producing maximally entangled pairs.

  9. Quantum Entanglement Theory and Its Generic Searches in High Energy Physics

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