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arXiv · 2505.00483

Search for a parity-violating long-range spin-dependent interaction

Xing Heng·Zitong Xu·Xiaofei Huang·Dinghui Gong·Guoqing Tian·Wei Ji·Jiancheng Fang·Dmitry Budker·Kai Wei
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Abstract

High-sensitivity quantum sensors are a promising tool for experimental searches for beyond-Standard-Model interactions. Here, we demonstrate an atomic comagnetometer operating under a resonantly-coupled hybrid spin-resonance (HSR) regime to probe P-odd, T-even interactions. The HSR regime enables robust nuclear-electron spin coupling, enhancing measurement bandwidth and stability without compromising the high sensitivity of spin-exchange relaxation-free magnetometers. To minimize vibration noise from velocity-modulated sources, we implement a multistage vibration isolation system, achieving a vibration noise reduction exceeding 700-fold. We establish new constraints on vector-boson-mediated parity-violating interactions, improving experimental sensitivity by three orders of magnitude compared to previous limits. The new constraints complement existing astrophysical and laboratory studies of potential extensions to the Standard Model.

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Xing Heng, Zitong Xu, Xiaofei Huang, Dinghui Gong, Guoqing Tian, Wei Ji, Jiancheng Fang, Dmitry Budker, Kai Wei. 2025-05-01. Search for a parity-violating long-range spin-dependent interaction. https://arxiv.org/abs/2505.00483

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