Kinetic mixing as the origin of a light dark-gauge-group scale
Kinetic mixing as the origin of a light dark-gauge-group scale
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DOI：
10.1103/physrevd.80.035008
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发表时间：
2009-02
影响因子：
5
通讯作者：
C. Cheung;J. Ruderman;Lian-tao Wang;I. Yavin
中科院分区：
文献类型：
--
作者：
C. Cheung;J. Ruderman;Lian-tao Wang;I. Yavin
我们提出了一个超对称弱尺度暗物质在U（1）{sub d}暗规范对称下带电的模型。U（1）{sub d}和超荷之间的动力学混合产生了适当的尺度层次，需要用GeV尺度的力载体和DAMA（或INTEGRAL）来解释PAMELA和ATIC，并使用非弹性（或分别激发）暗物质的建议。由于这种设置非常简单，观测约束导致模型参数的明确确定。特别地，DAMA散射截面与超荷D项真空期望值的大小直接相关。已知的暗物质遗迹丰度可以用来确定暗扇区耦合与暗物质质量的比值。最后，最近对宇宙射线正电子和电子过剩的观测可以用来固定暗物质的质量，方法是通过观测光谱中的肩部和通过拟合速率来确定动力学混合的大小。这些参数可以用来做进一步的预测，这些预测可以在未来的直接探测、间接探测以及对撞机实验中进行检验。
We propose a model in which supersymmetric weak scale dark matter is charged under a U(1){sub d} dark gauge symmetry. Kinetic mixing between U(1){sub d} and hypercharge generates the appropriate hierarchy of scales needed to explain PAMELA and ATIC with a GeV scale force carrier and DAMA (or INTEGRAL) using the proposals of inelastic (or, respectively, exciting) dark matter. Because of the extreme simplicity of this setup, observational constraints lead to unambiguous determination of the model parameters. In particular, the DAMA scattering cross section is directly related to the size of the hypercharge D-term vacuum expectation value. The known relic abundance of dark matter can be used to fix the ratio of the dark sector coupling to the dark matter mass. Finally, the recent observation of cosmic ray positron and electron excesses can be used to fix the mass of the dark matter through the observation of a shoulder in the spectrum and the size of the kinetic mixing by fitting to the rate. These parameters can be used to make further predictions, which can be checked at future direct detection, indirect detection, as well as collider experiments.