Cosmic ray anomalies and dark matter annihilation to muons via a Higgs portal hidden sector
Cosmic ray anomalies and dark matter annihilation to muons via a Higgs portal hidden sector
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DOI：
10.1103/physrevd.81.023530
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发表时间：
2009-05
影响因子：
5
通讯作者：
K. Kohri;J. McDonald;N. Sahu
中科院分区：
文献类型：
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作者：
K. Kohri;J. McDonald;N. Sahu
湮灭暗物质（DM）模型基于一个标量隐藏扇区，与标准模型具有希格斯门状耦合，被认为是最近观测到的宇宙射线过量的可能解释。研究了两种模型，一种是用非热DM作为升压因子的来源，另一种是用索默菲尔德增强。在非热DM的情况下，添加了四个在U(1)_{X}对称下变换的隐藏扇区标量。最重的标量解耦后衰减为DM标量，因此提供了解释当前DM湮灭率所需的升压因子。湮灭的标量的质量是有限的
Annihilating dark matter (DM) models based on a scalar hidden sector with Higgs portal-like couplings to the Standard Model are considered as a possible explanation for recently observed cosmic ray excesses. Two versions of the model are studied, one with non-thermal DM as the origin of the boost factor and one with Sommerfeld enhancement. In the case of non-thermal DM, four hidden sector scalars which transform under a U(1)_{X} symmetry are added. The heaviest scalars decouple and later decay to DM scalars, so providing the boost factor necessary to explain the present DM annihilation rate. The mass of the annihilating scalars is limited to