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  • Open Access

Quantum steering and discord in hyperon-antihyperon system in electron-positron annihilation

Sihao Wu1,*, Chen Qian2,†, Qun Wang1,3,‡, and Yang-Guang Yang4,§

  • *Contact author: shwu@mail.ustc.edu.cn
  • †Contact author: qianchen@baqis.ac.cn
  • ‡Contact author: qunwang@ustc.edu.cn
  • §Contact author: yyg@impcas.ac.cn
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Phys. Rev. D 113, 056030 – Published 30 March, 2026

DOI: https://doi.org/10.1103/x43x-3wgy

Abstract

Hyperon-antihyperon pairs produced from electron-positron annihilations provide a promising platform for exploring quantum-information properties in particle physics. In this work, we analyze quantum steering and quantum discord in hyperon-antihyperon systems produced from e+e− annihilations, based on the X-shaped spin density matrix reconstructed via quantum state tomography. We show that the behaviors of these correlations differ from those observed in elementary particle-antiparticle systems such as top quarks and τ leptons, owing to the polarization effects specific to hyperon decays. From the results, we examine the hierarchy of quantum correlations in hyperon-antihyperon systems, Bell nonlocality⊂steering⊂entanglement⊂discord. We also discuss the role of experimental loopholes and the impact of quantum decoherence in collider-based studies of quantum correlations.

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Phys. Rev. D 113, 056030– Published 30 March, 2026
  • Received 4 November 2025
  • Accepted 5 March 2026
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