用自旋放大器研究自旋相关的奇异相互作用
Search for exotic spin-dependent interactions with a spin-based amplifier
摘要：
发展新的技术来寻找标准模型之外的粒子，对于理解粒子物理学的紫外线完成是至关重要的。几个假设的粒子被预测为介导的标准模型的粒子之间的外来自旋相关的相互作用，可以访问到实验室实验。然而，实验室的研究大多是针对静态自旋相关的相互作用进行的，到目前为止只有少数实验涉及自旋和速度相关的相互作用。在这里，我们展示了一个搜索奇异的自旋和速度依赖的相互作用与自旋为基础的放大器。我们的技术利用超极化的核自旋作为前置放大器，以增强由奇异相互作用产生的伪磁场的效果，放大因子> 100。使用这样一个基于自旋的放大器，我们建立了在0.03-100米的力范围内的极化和非极化核子之间的自旋和速度相关的相互作用的约束。与以前的实验相比，我们的限制代表至少两个数量级的改进。所建立的技术可以进一步扩展到调查其他奇异的自旋相关的相互作用。
英文摘要：
Development of new techniques to search for particles beyond the standard model is crucial for understanding the ultraviolet completion of particle physics. Several hypothetical particles are predicted to mediate exotic spin-dependent interactions between particles of the standard model that may be accessible to laboratory experiments. However, laboratory searches are mostly conducted for static spin-dependent interactions, with only a few experiments so far addressing spin- and velocity-dependent interactions. Here, we demonstrate a search for exotic spin- and velocity-dependent interactions with a spin-based amplifier. Our technique makes use of hyperpolarized nuclear spins as a pre-amplifier to enhance the effect of pseudo-magnetic field produced by exotic interactions by an amplification factor of > 100. Using such a spin-based amplifier, we establish constraints on the spin- and velocity-dependent interactions between polarized and unpolarized nucleons in the force range of 0.03-100 m. Our limits represent at least two orders of magnitude improvement compared to previous experiments. The established technique can be further extended to investigate other exotic spin-dependent interactions.
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