发表机构
Yantai University（烟台大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文结合介子分辨势、数值散射、热遗迹及观测约束，评估两种标量介子实现中微子辅助暗物质自散射，发现中微子力在两种情形下均无法解释天体物理相关的暗物质自散射。
AI 中文摘要
我们通过结合介子分辨势、数值散射计算、热遗迹产生以及所采用的观测约束，评估了两种标量介子实现中的中微子辅助暗物质自散射。在t通道情形下，所采用的实验室和宇宙学约束抑制了在重现遗迹丰度并产生可观自相互作用的点上的中微子力贡献，这些自相互作用由树级介子交换主导。在轻介子区域，索末菲增强和早期动力学退耦可使遗迹丰度改变高达50%。在s通道情形下，热冻结固定了耦合，使得自散射远低于解释宇宙小尺度结构所需的数量级。一个解析上包络解释了相对于自相互作用暗物质基准超过十一个数量级的不足。这些结果确立了，在所采用的约束和热遗迹假设下，中微子力在两种实现中均无法解释天体物理相关的暗物质自散射。
英文摘要
We assess neutrino-assisted dark matter self-scattering in two scalar-mediator realizations by combining mediator-resolved potentials, numerical scattering calculations, thermal relic production, and the adopted observational constraints. In the $t$-channel case, the adopted laboratory and cosmological bounds suppress the neutrino force contribution at points reproducing the relic abundance and yielding sizable self-interactions, which are dominated by tree-level mediator exchange. Sommerfeld enhancement and early kinetic decoupling can change the relic abundance by up to 50\% in the light mediator regime. In the $s$-channel case, thermal freeze-out fixes the coupling, leaving self-scattering well below the order of magnitude required for explanation of small-scale structure of the universe. An analytic upper envelope explains this shortfall of more than eleven orders of magnitude relative to the self-interacting dark matter benchmark. These results establish that, under the adopted constraints and thermal relic assumptions, the neutrino force cannot account for astrophysically relevant dark matter self-scattering in either realization.
Comments10 pages, 7 figures
