探测质量大于40 $μ$ eV的QCD轴子暗物质的新实验方法
A new experimental approach to probe QCD axion dark matter in the mass range above 40$μ$eV
摘要：
轴子出现在标准模型的扩展中，解释了在强相互作用中没有CP破坏。同时，它可以自然地提供我们宇宙中的冷暗物质。在过去的几十年里，对轴子和类轴子粒子（ALP）的几次搜索限制了相应的参数空间，但没有发现它们存在的明确暗示。轴子质量范围低于1 meV仍然是非常有吸引力的，并且是暗物质轴子的一个很好的激励区域。在这份白皮书中，我们提出了一个新的实验的基础上的概念的介电晕圈直接搜索的暗物质轴子的质量范围为40至400 $μ$ eV的描述。这种磁盘和磁镜轴子实验（MADMAX）将由几个平行的介质盘组成，这些介质盘被放置在强磁场中，并且具有可调节的间隔。预期该设置允许在对应于轴子质量的10至100 GHz之间的频率下的轴子感应电磁波的可观测发射。
英文摘要：
The axion emerges in extensions of the Standard Model that explain the absence of CP violation in the strong interactions. Simultaneously, it can provide naturally the cold dark matter in our universe. Several searches for axions and axion-like particles (ALPs) have constrained the corresponding parameter space over the last decades but no unambiguous hints of their existence have been found. The axion mass range below 1 meV remains highly attractive and a well motivated region for dark matter axions. In this White Paper we present a description of a new experiment based on the concept of a dielectric haloscope for the direct search of dark matter axions in the mass range of 40 to 400 $μ$eV. This MAgnetized Disk and Mirror Axion eXperiment (MADMAX) will consist of several parallel dielectric disks, which are placed in a strong magnetic field and with adjustable separations. This setting is expected to allow for an observable emission of axion induced electromagnetic waves at a frequency between 10 to 100 GHz corresponding to the axion mass.
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