AI 中文总结
该研究针对e+e-湮灭产生的超子-反超子系统，计算量子信息可观测量，发现其横向极化限制CHSH不等式违反区域，同时探索量子关联作为强子结构探针的潜力。
AI 中文摘要
高能碰撞中的量子关联为基础物理和强子结构提供了新视角。我们计算了e+e-湮灭产生的自旋1/2粒子-反粒子系统中的量子信息可观测量，从两量子比特密度算符出发，针对BESIII实验中e+e-→B\bar{B}过程的Λ\bar{\bar{Λ}}、Σ+\bar{\bar{Σ}}-和Λ+c\bar{\bar{Λ}}-c系统，计算了贝尔变量、并发度和负性随散射角和碰撞能量的变化关系。与基本粒子-反粒子系统不同，超子-反超子系统的B和\bar{B}相对于产生平面具有非零的横向极化，这显著限制了CHSH不等式被违反的运动学区域，但对纠缠几乎无影响。我们还将分析扩展到自旋1/2粒子-反粒子产生的一般情况，探索利用量子关联作为强子结构探针的潜力，尤其是重味介子内部部分子层次的纠缠。
英文摘要
Quantum correlations in high-energy collisions provide a novel perspective on both fundamental physics and hadron structure. We calculate the quantum information observable in spin-1/2 particle-antiparticle systems produced in $e^+e^-$ annihilation. Starting from the two-qubit density operator, we calculate the Bell variable, concurrence and negativity as functions of the scattering angle and collision energy for the $Λ\barΛ$, $Σ^+\barΣ^-$, and $Λ^+_c\barΛ^-_c$ systems in the process $e^+e^-\rightarrow B\bar{B}$ at BESIII experiments. Unlike elementary particle-antiparticle systems, the hyperon-antihyperon system exhibits non-vanishing transverse polarization for $B$ and $\bar{B}$ with respect to the production plane, which significantly restrict the kinematic region where the CHSH inequality is violated while leaving the entanglement largely unaffected. We also extend our analysis to the general case of spin-1/2 particle-antiparticle production, and explore the potential of using quantum correlations as probes to hadron structure, particularly to the parton-level entanglement inside heavy-flavored mesons.
Comments18 pages, 41 figures
