关于阿克森调制偶极-偶极相互作用的新约束
摘要
阿克森的搜索横跨解决基本物理学中的关键问题，包括强 CP 问题、揭示暗物质的本质以及理解宇宙物质-反物质不对称的起源。阿克森介导的自旋相关相互作用的测量为阿克森探测提供了强大的途径。然而，这长期受限于“阿克森窗口”之外的区域，due to a significant trade-off: the need to effectively suppress来自高度偏好的自旋源的磁场泄漏，同时在亚毫特拉水平检测亚毫斯特拉水平的异域物理信号。 In this work, we report new experimental results on axion-mediated exotic spin-spin interactions using an iron-shielded SmCo spin source in combination with a specially designed self-compensation comagnetometer. Employing a composite shielding structure, we achieved a suppression of the magnetic field by up to . This enabled us to establish new constraints on the coupling between electrons and neutrons, surpassing previous experimental limits by more than 10000 times within the axion window. Furthermore, we also set strongest constraints on the coupling between electrons and protons. The proposed method holds substantial potential not only for advancing the search for new physics beyond the Standard Model but also for enabling transformative applications in biological and chemical research.
引用
@article{arxiv.2501.07865,
title = {New Constraints on Axion Mediated Dipole-Dipole Interactions},
author = {Zitong Xu and Xing Heng and Guoqing Tian and Di Gong and Lei Cong and Wei Ji and Dmitry Budker and Kai Wei},
journal= {arXiv preprint arXiv:2501.07865},
year = {2025}
}