The mirror twin Higgs (MTH) addresses the little hierarchy problem by relating every Standard Model (SM) particle to a twin copy, but is in tension with cosmological bounds on light degrees of freedom. Asymmetric reheating has recently been proposed as a simple way to fix MTH cosmology by diluting the twin energy density. We show that this dilution sets the stage for an interesting freeze-in scenario where both the initial absence of dark sector energy and the feeble coupling to the SM are motivated for reasons unrelated to dark matter production. We give the twin photon a Stueckelberg mass and freeze-in twin electron and positron dark matter through the kinetic mixing portal. The kinetic mixing required to obtain the dark matter abundance is of the loop-suppressed order expected from infrared contributions in the MTH.
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机译：镜子双HIGGS（MTH）通过将每个标准模型（SM）粒子与双拷贝相关联来解决小层次问题，但在轻微的自由度上具有宇宙学界的张力。 最近已经提出了不对称再加热作为通过稀释双能量密度来修复MTH宇宙的简单方法。 我们表明，这种稀释将为一个有趣的冻结方案设定了一个有趣的冻结场景，其中初始缺乏黑暗扇区能量和微弱的耦合与SM的态度有关与暗物质生产无关的原因。 通过动力学混合门户，我们通过动力学搅拌门户将Twin PhotoCone A Stueckelberg Mass和冻结双胞胎和正电子暗物质。 获得暗物质丰度所需的动力学混合是从MTH中的红外贡献预期的环形抑制顺序。
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