论文标题
中微子门户通过循环
Neutrino Portal via Loops
论文作者
论文摘要
通常假定对暗物质（DM）歼灭横截面的一个环校正在计算DM遗物密度时是分子的。在本文中，我们提出了一个场景，其中DM主要通过中微子门户中的环路冻结。对于标量DM通过三角图将其灭入中微子，或通过盒子图将其歼灭到中微子中的Majorana DM，如果调解器是Majorana fermion，则可以生成观察到的DM遗物密度。我们进一步解决了黑色光环中的中微子Debye质量和中微子振荡概率。数值结果表明，DM对这些物理可观察物的影响在地球上可以忽略不计，但是分析结果可以应用于在密集的DM环境中评估中微子性质。
One loop correction to the dark matter (DM) annihilation cross section is usually assumed to be sub-dominate in calculating the DM relic density. In this paper, we propose a scenario where DM freezes out mainly via loops in the neutrino portal. For a scalar DM annihilating into neutrino via a triangle diagram, or a Majorana DM annihilating into neutrino via a box diagram, the observed DM relic density can be generated if the mediator is Majorana fermion. We further work out the neutrino Debye mass and neutrino oscillation probabilities in the dark halo. Numerical results show that impactions of DM to these physical observables are negligible on the Earth, however the analytical results can be applied to evaluate neutrino properties in a dense DM environment.
