发表机构
University of Maryland, College Park; Perimeter Institute for Theoretical Physics; Lawrence Berkeley National Laboratory; University of California, Berkeley（马里兰大学帕克分校; 珀due理论物理研究所; 劳伦斯伯克利国家实验室; 加州大学伯克利分校）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文研究超轻轴矢量暗物质，通过其与费米子及光子的耦合增强自旋扭矩，并探讨实验探测途径，结果亦适用于弦理论中的Kalb-Ramond暗物质。
AI 中文摘要
超轻暗物质可能是一个轴矢量场，这一简单可能性推动了新实验的开展。通过轴矢量流或暗电偶极矩算符与费米子的耦合，相较于轴子暗物质，会产生增强的自旋扭矩。轴矢量场还具有轴子-光子耦合的类似物，但其一致实现需要光子质量。在这种“轴-光子”耦合下，背景磁场的影响被抑制，最强的实验探测涉及偏振测量、超导腔中的电场以及宇宙微波背景。由于有质量轴矢量场与有质量二形式场对偶，我们的结果也适用于受弦理论启发的“Kalb-Ramond”暗物质。
英文摘要
Ultralight dark matter could be an axial vector field, a simple possibility which motivates new experiments. Couplings to fermions, through an axial vector current or a dark electric dipole moment operator, lead to enhanced spin torques compared to axion dark matter. An axial vector also has an analogue of the axion-photon coupling, though its consistent realization requires a photon mass. Under this "axial-photon" coupling, the effect of a background magnetic field is suppressed, and the strongest experimental probes involve polarimetry, electric fields in superconducting cavities, and the cosmic microwave background. Since a massive axial vector is dual to a massive two-form, our results also apply to "Kalb-Ramond" dark matter motivated by string theory.
Comments54 pages + references, 5 figures
