标题： 纠缠和贝尔不等式在$B\to \it{ΦΦ}$衰变中的违反 显示英文标题

标题： Entanglement and Bell inequality violation in $B\to \it{ΦΦ}$ decays

摘要： 介子$B$衰变为矢量介子，已在LHCb实验中观测到，这为利用量子信息理论方法研究粒子物理现象提供了一个理想的实验室。 在本文中，我们专注于产生一对$\it{\Phi}$介子的衰变，以研究系统自旋关联中纠缠的存在，并量化其导致的贝尔不等式违反程度。 我们的结果表明，目前的LHCb数据在两种情况下都允许以超过5$\sigma$阈值的显著性访问纠缠和贝尔不等式违反。 这表明，负责$B$介子衰变的强相互作用和弱电相互作用作为纠缠的来源，展现了高能现象的量子力学本质。 特别关注对漏洞的评估：可能使贝尔测试结果无效的实验装置中的缺陷。 显示英文摘要

摘要： The decays of the $B$ meson into vector mesons, observed at the LHCb experiment, provide an ideal laboratory to investigate particle physics phenomena with quantum information theory methods. In this article, we focus on the decays yielding a pair of $\it{\Phi}$ mesons to investigate the presence of entanglement in the spin correlations of the system and quantify the amount of Bell inequality violation it entails. Our results show that the present LHCb data allows access to entanglement and to the Bell inequality violation with a significance exceeding the 5$\sigma$ threshold in both the cases. This demonstrates that the strong and electroweak interactions responsible for the $B$ meson decay act as a source of entanglement and the quantum mechanics nature of high-energy phenomena. Particular attention is paid to the assessment of loopholes: deficiencies in the experimental setup which could invalidate the results of the Bell test.