New dynamics from hidden sectors may manifest as long-range forces between visible matter particles. The well-known case of Yukawa-like potentials occurs via the exchange of a single virtual particle. However, more exotic behavior is also possible. We present three classes of exotic potentials that are generated by relativistic theories: (i) quantum forces from the loop-level exchange of two virtual particles, (ii) conformal forces from a conformal sector, and (iii) emergent forces from degrees of freedom that only exist in the infrared regime of the theory. We discuss the complementarity of spin-dependent force searches in an effective field theory framework. We identify well-motivated directions to search for exotic spin-dependent forces.

中文翻译：

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来自隐藏扇区的奇异自旋相关力

来自隐藏扇区的新动力学可能表现为可见物质粒子之间的远程力。众所周知的类似汤川势的案例是通过单个虚拟粒子的交换发生的。然而，更奇特的行为也是可能的。我们提出了由相对论理论产生的三类奇异势：（i）来自两个虚拟粒子的环级交换的量子力，（ii）来自共形扇区的共形力，以及（iii）来自自由度的涌现力只存在于理论的红外范围内。我们在有效的场论框架中讨论了自旋相关力搜索的互补性。我们确定了寻找奇异的自旋相关力的动机良好的方向。