利用正电子素湮灭光子线偏振以10$^{-4}$精度检验离散对称性
高能物理 - 唯象学
2024-01-23 v1 核实验
摘要
离散对称性在粒子物理中扮演着重要角色，CP破坏与宇宙中的物质-反物质不对称性相关。我们报告了利用正电子素衰变光子偏振方法对正-电子素衰变中P、T和CP不变性进行的最精确检验。正电子素是电子与正电子的最简单束缚态，最近因测得的超精细能量结构与理论在10水平上存在差异而备受关注，这表明需要在此水平上更好地理解正电子素系统。我们使用专用的J-PET断层扫描仪，通过康普顿散射逐事件确定光子偏振，且无需像先前实验那样用外部磁场控制正电子素的自旋，来检验离散对称性。我们的结果在0.0007和一个标准偏差的水平上与量子电动力学（QED）预期一致。
引用
@article{arxiv.2401.12092,
title = {Discrete symmetries tested at 10$^{-4}$ precision using linear polarization of photons from positronium annihilations},
author = {Paweł Moskal and Eryk Czerwiński and Juhi Raj and Steven D. Bass and Ermias Y. Beyene and Neha Chug and Aurélien Coussat and Catalina Curceanu and Meysam Dadgar and Manish Das and Kamil Dulski and Aleksander Gajos and Marek Gorgol and Beatrix C. Hiesmayr and Bożena Jasińska and Krzysztof Kacprzak and Tevfik Kaplanoglu and Łukasz Kapłon and Konrad Klimaszewski and Paweł Konieczka and Grzegorz Korcyl and Tomasz Kozik and Wojciech Krzemień and Deepak Kumar and Simbarashe Moyo and Wiktor Mryka and Szymon Niedźwiecki and Szymon Parzych and Elena Pérez del Río and Lech Raczyński and Sushil Sharma and Shivani Choudhary and Roman Y. Shopa and Michał Silarski and Magdalena Skurzok and Ewa Ł. Stępień and Pooja Tanty and Faranak Tayefi Ardebili and Keyvan Tayefi Ardebili and Kavya Valsan Eliyan and Wojciech Wiślicki},
journal= {arXiv preprint arXiv:2401.12092},
year = {2024}
}
备注
17 pages, 10 figures