AI 中文总结
该研究提出辐射中微子门户到隐匿暗物质的几何起源，通过五维隔绝设置解释树级门户耦合为零的边界条件，重中微子质量尺度受直接探测和大爆炸核合成约束，可行质量范围覆盖多TeV至PeV及更高尺度。
AI 中文摘要
我们研究一种隐匿暗物质场景，其中实验室信号微弱的原因与中微子质量的起源相关。在四维理论中，暗区包含一个隐藏标量、一个费米型暗物质粒子以及重马约拉纳中微子；同一重中微子区段通过跷跷板机制产生轻中微子质量，同时在单圈水平诱导出希格斯-暗标量门户，该门户与观测到的微小中微子质量相关联，自然导致极小的希格斯-单态混合，从而抑制直接探测和对撞机实验中的信号。随后，我们通过五维隔绝设置，为树级门户耦合为零的边界条件提供几何起源：κ(Λ_UV)=0。在该构造中，标准模型场和隐藏区段局域在不同的膜上，惰性中微子在体中传播；五维定域性禁止了基本的局域树级希格斯-暗标量接触相互作用，而重中微子圈则诱导出微小的残余门户耦合。控制模型可行性的主要唯象学参数是重中微子质量尺度：直接探测从上方约束该尺度，而大爆炸核合成则通过要求暗标量足够早地衰变，从下方约束该尺度。根据五维隔绝的程度，可行区域的重中微子质量范围可从多TeV尺度到PeV尺度，甚至更高。
英文摘要
We study a secluded dark-matter scenario in which the smallness of laboratory signals is linked to the origin of neutrino masses. In the four-dimensional theory, the dark sector contains a hidden scalar, a fermionic dark-matter particle, and heavy Majorana neutrinos. The same heavy-neutrino sector that generates light neutrino masses via the seesaw mechanism also induces the Higgs-dark-scalar portal at one loop. This portal is tied to the small observed neutrino masses, naturally leading to very small Higgs-singlet mixing and suppressed signals in direct-detection and collider experiments. We then provide a geometric origin for the boundary condition of the tree level portal coupling being zero $κ(Λ_{\rm UV})=0$ via a five-dimensional sequestered setup. In this construction, the Standard Model fields and the hidden sector are localized on different branes, with sterile neutrinos propagating in the bulk. Five-dimensional locality forbids a fundamental local tree-level Higgs-dark-scalar contact interaction, while heavy-neutrino loops induce a small residual portal coupling. The main phenomenological parameter controlling the viability of the model is the heavy-neutrino mass scale: direct detection bounds it from above, while Big Bang nucleosynthesis bounds it from below through the requirement that the hidden scalar decays sufficiently early. Depending on the amount of five-dimensional sequestering, the viable region can span heavy-neutrino masses from the multi-TeV scale to the PeV scale, or even higher.
Comments57 pages and 7 figures. Comments are welcome!
