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arXiv 2104.02074hep-phastro-ph.HEhep-ex
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孪生Higgs模型中镜像物质的直接探测

Direct Detection of Mirror Matter in Twin Higgs Models

Zackaria Chacko, David Curtin, Michael Geller, Yuhsin Tsai

摘要:

我们探讨了在直接探测实验中发现镜像重子和镜像孪生希格斯模型的电子的可能性,在这种情况下,这些粒子构成所观察到的DM的子组件。我们考虑一个框架中的镜像费米子是亚纳米充电,作为动力学的光子和它的镜像对应物之间的混合的结果。我们考虑核反冲和电子反冲实验。事件发生率取决于镜DM的电离部分,也取决于它在星系中的分布。由于镜像DM是耗散的,在地球的位置,它可能是晕的形式,也可能坍缩成盘,这取决于冷却速率。对于一个给定的镜像DM丰度,我们确定预期的事件率在直接检测实验的电离晕,电离盘,原子晕和原子盘的限制情况下。我们发现,通过利用不同实验的互补性,不仅可以建立镜像暗物质的多组分性质,而且可以建立其在星系中的分布。此外,对反冲能的研究可能能够确定镜面扇区组成部分的质量和电荷。通过证明镜像氦的质量和电荷是镜像氢的整数倍,这些实验有可能区分理论的镜像性质。我们还仔细考虑镜像等离子体屏蔽效应,表明在地球上捕获镜像暗物质粒子对直接探测信号的影响最大。

英文摘要:

We explore the possibility of discovering the mirror baryons and electrons of the Mirror Twin Higgs model in direct detection experiments, in a scenario in which these particles constitute a subcomponent of the observed DM. We consider a framework in which the mirror fermions are sub-nano-charged, as a consequence of kinetic mixing between the photon and its mirror counterpart. We consider both nuclear recoil and electron recoil experiments. The event rates depend on the fraction of mirror DM that is ionized, and also on its distribution in the galaxy. Since mirror DM is dissipative, at the location of the Earth it may be in the form of a halo or may have collapsed into a disk, depending on the cooling rate. For a given mirror DM abundance we determine the expected event rates in direct detection experiments for the limiting cases of an ionized halo, an ionized disk, an atomic halo and an atomic disk. We find that by taking advantage of the complementarity of the different experiments, it may be possible to establish not just the multi-component nature of mirror dark matter, but also its distribution in the galaxy. In addition, a study of the recoil energies may be able to determine the masses and charges of the constituents of the mirror sector. By showing that the mass and charge of mirror helium are integer multiples of those of mirror hydrogen, these experiments have the potential to distinguish the mirror nature of the theory. We also carefully consider mirror plasma screening effects, showing that the capture of mirror dark matter particles in the Earth has at most a modest effect on direct detection signals.

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