论文标题
黑暗初始状态辐射和动力学混合门户
Dark Initial State Radiation and the Kinetic Mixing Portal
论文作者
论文摘要
来自宇宙微波背景（CMB）的Planck测量值的数据对具有光暗物质（DM）和光中介器的模型放置了重要的限制，尤其是当两者都位于低于$ \ sim 1 $ GEV的质量范围时。 In models involving kinetic mixing where the dark photon acts as the mediator, these constraints are easily satisfied and the appropriate DM relic density achievable if the DM is, e.g., a complex scalar, where $p$-wave annihilation occurs, or is the lighter component of a split pseudo-Dirac state where co-annihilation dominates.在这两种情况下，尽管$ g_d $中的较高阶段，但包括深色光子初始状态辐射（ISR）在内的相应的an灭过程将主要是$ s $ - $ s $ - 基本上是独立的横截面。这些黑暗ISR相关的过程的速率虽然不产生足够大以促进遗物密度的横截面，但仍可能遇到可能与CMB产生的界限发生冲突。在本文中，我们对CMB对当前和潜在的未来约束进行了初步研究，该研究由于存在这种黑暗ISR而对这两种情况的参数空间施加了。明确需要进一步分析DM ISR在DM歼灭中的影响。
Data from Planck measurements of the cosmic microwave background (CMB) place important constraints on models with light dark matter (DM) and light mediators especially when both lie in the mass range below $\sim 1 $ GeV. In models involving kinetic mixing where the dark photon acts as the mediator, these constraints are easily satisfied and the appropriate DM relic density achievable if the DM is, e.g., a complex scalar, where $p$-wave annihilation occurs, or is the lighter component of a split pseudo-Dirac state where co-annihilation dominates. In both of these cases, although higher order in the dark gauge coupling, $g_D$, the corresponding annihilation processes including dark photon initial state radiation (ISR) will be dominantly $s$-wave with essentially temperature independent cross sections. The rates for these dark ISR associated processes, though not yielding cross sections large enough to contribute to the relic density, can still run into possible conflicts with the bounds arising from the CMB. In this paper we perform a preliminary study of the present and potential future constraints that the CMB imposes on the parameter spaces for both of these scenarios due to the existence of this dark ISR. Further analyses of the effects of dark ISR in DM annihilation is clearly warranted.
