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首页> 外文期刊>Physical review, D >Dark matter from dark photons: A taxonomy of dark matter production
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Dark matter from dark photons: A taxonomy of dark matter production

机译：来自暗光子的暗物质：暗物质生产的分类

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We analyze how dark matter (DM) can be produced in the early Universe, working in the framework of a hidden sector charged under a U(1)' gauge symmetry and interacting with the Standard Model through kinetic mixing. Depending on the masses of the dark matter particle and of the dark photon, as well as on the hidden U(1)0 gauge coupling and the kinetic mixing parameter, we classify all the distinct regimes along which the observed dark matter relic density can be accounted for. We find that nine regimes are potentially operative to produce the DM particles, and these operate along five distinct dynamical mechanisms. Among these, four regimes are new and correspond to regimes in which the DM particles are produced by on-shell dark photons. One of them proceeds along a new dynamical mechanism, which we dub sequential freeze-in. We argue that such regimes and the associated dynamical mechanisms are characteristic of DM models for which, on top of the Standard Model and the dark sector, there are other massive, but relatively light particles—akin to the dark photon—that interact with both the SM and the DM sectors.
机译：我们分析了在早期宇宙中生产的暗物质（DM），在用U（1）尺寸对称下的隐藏部门的框架内工作，并通过动力学混合与标准模型与标准模型进行交互。取决于暗物质颗粒和深色光子的质量，以及隐藏的U（1）0计耦合和动力学混合参数，我们分类了所观察到的暗物质遗物密度的所有明显的制度占了。我们发现，九个制度可能术术而不能生产DM颗粒，并且这些制度沿着五种不同的动态机制操作。其中，四个制度是新的，并且对应于通过在壳体黑光子产生DM粒子的制度。其中一个沿着一种新的动态机制进行，我们将顺序冻结进行化。我们认为这样的制度和相关的动态机制是DM模型的特征，在标准模型和黑暗部门之上，还有其他巨大但相对较轻的粒子 - 类似于黑色光子 - 与两者相互作用SM和DM部门。

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