In the framework of the scotogenic model, which features radiative generation of neutrino masses, we explore light dark matter scenario. Throughout the paper we chiefly focus on keV-scale dark matter which can be produced either via freeze-in through the decays of the new scalars, or from the decays of next-to-lightest fermionic particle in the spectrum, which is produced through freeze-out. The latter mechanism is required to be suppressed as it typically produces a hot dark matter component. Constraints from BBN are also considered and in combination with the former production mechanism they impose the dark matter to be light. For this scenario we consider signatures at High Luminosity LHC and proposed future hadron and lepton colliders, namely FCC-hh and CLIC, focusing on searches with two leptons and missing energy as a final state. While a potential discovery at High Luminosity LHC is in tension with limits from cosmology, the situation greatly improves for future colliders.

中文翻译：

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阐明 scotogenic 模型：对撞机和宇宙学的相互作用

在以中微子质量辐射生成为特征的 scotogenic 模型的框架中，我们探索了轻暗物质场景。在整篇论文中，我们主要关注 keV 尺度的暗物质，它可以通过新标量衰变的冻结产生，也可以通过光谱中次轻的费米子粒子衰变产生，后者通过冻结产生-出去。后一种机制需要被抑制，因为它通常会产生热暗物质成分。还考虑了来自 BBN 的约束，并结合以前的生产机制，将暗物质强加为光。对于这种情况，我们考虑了 High Luminosity LHC 的签名，并提出了未来的强子和轻子对撞机，即 FCC-hh 和 CLIC，专注于使用两个轻子和缺失能量作为最终状态的搜索。