Polarized hyperon-antihyperon pairs shed light on various unresolved puzzles in contemporary physics: How the strong interaction confines quarks into hadrons, how accurately the Standard Model describes microcosmos and even why our universe consists of so much more matter than antimatter. Thanks to their weak, parity violating decays, hyperons reveal their spin properties. This can be exploited e.g. the decomposition of the electromagnetic structure of hyperons, precision tests of flavour symmetry and searches for CP violation. At the BESIII experiment at BEPC-II, Beijing, China, hyperon-antihyperon pairs can be produced in abundance. Recently collected large data samples have triggered the development of new methods that provide unprecedented precision and a plethora of new results have emerged. When applied at future high-intensity facilities like PANDA and STCF, precision physics will be taken to a new level which can contribute to the solution to the aforementioned puzzles.
Entanglement redistribution of hyperon-antihyperon pair via sequential decay
Nankai University(南开大学);Institute of Modern Physics, Chinese Academy of Sciences(中国科学院近代物理研究所);University of Chinese Academy of Sciences(中国科学院大学);Department of Physics, Hebei University(河北大学物理学院)
Spin correlation of hyperon-antihyperon systems in $e^+e^-$ annihilation
University of Science and Technology of China(中国科学技术大学);Anhui Center for fundamental sciences in theoretical physics(安徽基础科学前沿中心);State Key Laboratory of Particle Detection and Electronics(粒子探测与电子学国家重点实验室);School of Mechanics and Physics, Anhui University of Science and Technology(安徽理工大学力学与光电学院)
Manipulating Bell nonlocality and entanglement in polarized electron-positron annihilation
College of Physics Science and Technology, Hebei University(河北大学物理科学与技术学院);Institute of Modern Physics, Chinese Academy of Sciences(中国科学院近代物理研究所);University of Chinese Academy of Sciences(中国科学院大学);Research Center for Hadron and CSR Physics, Lanzhou University and Institute of Modern Physics of CAS(兰州大学重离子物理与加速器大科学装置研究中心与中国科学院近代物理研究所)
Search for CP Violations in the Production and Decay of the Hyperon-Antihyperon Pairs
Institute of Frontier and Interdisciplinary Science, Shandong University(山东大学前沿交叉科学研究中心);Southern Center for Nuclear-Science Theory (SCNT), Institute of Modern Physics, Chinese Academy of Sciences(中国科学院近代物理研究所南方核科学理论中心);Institute of High Energy Physics, Chinese Academy of Sciences(中国科学院高能物理研究所);University of Chinese Academy of Sciences(中国科学院大学)
Searches for new physics beyond the Standard Model in hyperon sector
University of Chinese Academy of Sciences(中国科学院大学);National Centre for Nuclear Research(国家核研究中心);Institute of High Energy Physics, Chinese Academy of Sciences(中国科学院高能物理研究所)
Ascertaining higher-order quantum correlations in high energy physics
School of Physical Sciences, University of Chinese Academy of Sciences(中国科学院大学物理科学学院);ICTP-AP, University of Chinese Academy of Sciences(中国科学院大学ICTP亚太中心)
Controlling Quantum discord and steering in Electron-Positron Annihilation Using Polarized Beams
Hebei University(河北大学);Institute of Modern Physics, Chinese Academy of Sciences(中国科学院近代物理研究所);University of Chinese Academy of Sciences(中国科学院大学);Lanzhou University(兰州大学)
Study of CP violation in hyperon decays at Super Charm-Tau Factories with a polarized electron beam
重子的非轻子两体弱衰变是研究电荷共轭宇称对称性破坏的重要工具。我们解释了为什么奇异重子的衰变能为K介子的衰变提供补充信息。评述了$Λ$ -和$Ξ$ -重子非轻子衰变的模型无关参数化,并根据最新的实验输入更新了振幅。我们展示了在亮度为$10^{35}$ cm $^{-2}$ s $^{-1}$的下一代正负电子$J/ψ$工厂中进行奇异重子衰变的精确测试的潜力。通过$J/ψ$共振大量产生自旋纠缠的超子-反超子对,使得可以直接比较重子和反重子的衰变性质。利用解析近似和数值计算,我们研究了自旋相关和极化在CP测试中的定量影响。我们表明,通过使用一个偏振的电子束,CP测试的统计精度可以显着提高相比,没有偏振束的实验。此外,我们还为可能的改进制定了进一步的方向,例如分析不完全重建的事件或同位旋相关过程的组合。总之,这些方法是有前途的观察一个统计上显着的CP违规信号与强度对应的标准模型的预测。我们的结论应鼓励进行更详细的可行性研究,包括优化测量方法和系统效应研究。最后,我们的研究结果要求更新的理论预测精度提高。
Radiative corrections to the semileptonic Dalitz plot with angular correlation between polarized decaying and emitted hyperons: effects of the four-body region
Growth of Interaction Between Antiprotons (Negative Hyperons) and Nuclei in Polarized Matter: The Possibility to Study the Spin-Dependent Part of the Forward Scattering Amplitude in the Range of Low-Energies
Matching between Collinear Twist-3 and TMD Fragmentation Function Contributions to Polarized Hyperon Production in SIDIS
Graduate School of Science and Technology, Niigata University(新潟大学科学技术研究生院);Department of Physics, Niigata University(新潟大学物理系);State Key Laboratory of Nuclear Physics and Technology, Institute of Quantum Matter, South China Normal University(华南师范大学量子物质研究所核物理与技术国家重点实验室);Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter, Guangdong Provincial Key Laboratory of Nuclear Science(广东省物质结构与基本相互作用卓越基础研究中心、广东省核科学重点实验室)
在LHC实验的运动学区域,特别是在ALICE实验中,考虑质子-质子散射p p ->(Λ^ \uparrow喷流)喷流X中极化λ超子的产生.我们提出了一个新的Lambda偏振观察到的Sivers效应的碎片化过程中产生的。即使在中快度时,它也可能很大,因此对于高能强子对撞机实验来说很有意义。除了它的潜力,揭示在非极化强子碰撞中产生的Lambda极化现象背后的机制,新的观察原则上也允许测试可能的色流依赖的单自旋不对称性和(非)横向动量依赖的碎片功能的普遍性。