论文标题
（sub）$ u（1）_x $ higgs门户模型中的GEV暗物质
(sub)GeV Dark Matter in the $U(1)_X$ Higgs Portal Model
论文作者
论文摘要
在这项研究中，我们认为$ u（1）_x $量规玻色子充当暗物质候选者。当复杂的单线标量标量自发打破量表对称性时，矢量暗物质（DM）会变得质量，并在光谱中增加了第二个希格斯玻色子。暗物质候选者通过标量-Higgs门户与SM颗粒通信。在这项工作中，我们专注于矢量暗物质的质量和低于10 GEV的标量介质（又称光暗物质）。尽管我们使用完整的Boltzmann方程的零时为矢量DM进行热冻结来计算遗物丰度，但我们探索了当矢量DM互音时，我们探索了第二矩的效果。由于通常光DM对CMB的边界高度敏感，因此我们专注于两种减轻这种结合的热机制：通过禁止通道和杆附近的暗物质歼灭。施加了来自山液，热量条件，束降低实验和天体物理观察的其他边界。考虑到包括直接检测上限在内的所有界限，可以实现可行的空间。
In this research we consider a $U(1)_X$ gauge boson acting as a dark matter candidate. The vector dark matter (DM) gets mass when a complex singlet scalar breaks the gauge symmetry spontaneously, adding a second Higgs boson to the spectra. The dark matter candidates communicate with the SM particles via a scalar-Higgs portal. In this work, we concentrate on the masses of the vector dark matter and the scalar mediator below 10 GeV, aka light dark matter. Although we assume thermal freeze-out for the vector DM using the zero-moment of the full Boltzmann equation to calculate the relic abundance, we explore the effects of the second-moment when the vector DM annihilates resonantly. As typically light DM is highly sensitive to CMB bounds, we focus on two thermal mechanisms which alleviate this bound: dark matter annihilation via forbidden channels and near a pole. Other bounds from colliders, thermalization conditions, beam-dump experiments, and astrophysical observations are imposed. Taking into account all the bounds including the direct detection upper limits, the viable space is achieved.
