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arXiv 2104.01096hep-ph
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标量暗物质简单双标量介体模型中直接探测抑制区的探索

Exploring Direct Detection Suppressed Regions in a Simple 2-Scalar Mediator Model of Scalar Dark Matter

Jérôme Claude, Stephen Godfrey

摘要:

我们探索区域的参数空间,产生抑制直接检测截面的标量暗物质与标量门户,混合与标准模型希格斯粒子的简单模型。我们发现,即使是这个简单的模型允许相当大的空间中的参数空间,尚未被排除的直接检测限。导致这一结果的一些影响以前已经注意到。我们的主要新结果探讨了DM湮灭的不同贡献之间的干扰效应时,DM质量大于标量门户网站的质量。新的湮灭通道打开,模型的参数需要进行补偿,以给出正确的DM残留物丰度,从而导致更小的直接探测截面。我们发现,即使在一个非常简单的模型DM仍然有相当大的区域的参数空间,不排除由实验。

英文摘要:

We explore regions of parameter space that give rise to suppressed direct detection cross sections in a simple model of scalar dark matter with a scalar portal that mixes with the standard model Higgs. We found that even this simple model allows considerable room in the parameter space that has not been excluded by direct detection limits. A number of effects leading to this result have been previously noted. Our main new result explores interference effects between different contributions to DM annihilation when the DM mass is larger than the scalar portal mass. New annihilation channels open up and the parameters of the model need to compensate to give the correct DM relic abundance, resulting in smaller direct detection cross sections. We find that even in a very simple model of DM there are still sizeable regions of parameter space that are not ruled out by experiment.

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