arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2405.09201hep-phhep-exquant-ph
收藏

在 FCC-ee 上利用 $τ$ 轻子进行量子断层扫描

Quantum tomography with $τ$ leptons at the FCC-ee

M. Fabbrichesi, L. Marzola

AI总结:

本文探讨在 FCC-ee 上利用大量 $τ$ 轻子进行量子断层扫描,以测试量子纠缠和 Bell 不等式违反,并测定 Weinberg 角和约束反常耦合。

摘要:

未来环形对撞机(FCC)——作为其首次运行的轻子对撞机——根据拟议的设计,将在 $Z$ 玻色子共振能量下工作四年后产生超过 1000 亿对 $τ$ 轻子。$τ$ 轻子的特殊性在于其相对较长的寿命使得重建单 pion 衰变模式中发射的中微子的动量成为可能。由此产生的大量事件是进行该过程完整量子断层扫描的理想来源,这将以前所未有的精度测试量子纠缠和 Bell 不等式的违反。此外,极化和自旋相关性的研究可以提供对 Weinberg 角 $ θ_W$ 的具有竞争力的测定,并约束中性电弱电流中可能存在的反常耦合。我们利用解析结果和 Monte Carlo 模拟来探索在多大程度上可以实现这些目标。

英文摘要:

The Future Circular Collider (FCC) -- in its first incarnation as a lepton collider -- will produce, according to the proposed design, more than 100 billion pairs of $τ$ leptons after working for four years at the energy of the $Z$-boson resonance. The $τ$ lepton is special because its relatively long lifetime makes it possible to reconstruct the momenta of neutrinos emitted in the single pion decay mode. The resulting large number of events is an ideal source for a full quantum tomography of the process that will test quantum entanglement and the violation of Bell inequality with unprecedented precision. In addition, the study of polarizations and spin correlations can provide a competitive determination of the Weinberg angle $ θ_W$ and constrain possible anomalous couplings in the neutral electroweak current. We utilize analytic results and Monte Carlo simulations to explore to what extent these goals might be accomplished.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑