We describe a new mechanism of dark matter production. If dark matter particles acquire mass during a first order phase transition, it is energetically unfavourable for them to enter the expanding bubbles. Instead, most of them are reflected and quickly annihilate away. The bubbles eventually merge as the phase transition completes and only the dark matter particles which have entered the bubbles survive to constitute the observed dark matter today. This mechanism can produce dark matter with masses from the TeV scale to above the PeV scale, surpassing the Griest–Kamionkowski bound.

中文翻译：

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一阶相变时滤除的暗物质

我们描述了暗物质产生的新机制。如果暗物质颗粒在一级相变过程中获得质量，则在能量上不利于它们进入膨胀的气泡。相反，它们中的大多数被反射并迅速消灭。随着相变的完成，气泡最终合并，只有进入气泡的暗物质粒子才能幸存，构成今天观察到的暗物质。这种机制可以产生质量从TeV尺度到PeV尺度以上的暗物质，超过了Griest–Kamionkowski界。