Dark matter for excess of AMS-02 positrons and antiprotons
Dark matter for excess of AMS-02 positrons and antiprotons
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DOI：
10.1016/j.physletb.2015.06.035
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发表时间：
2015-04
影响因子：
4.4
通讯作者：
C. Chen;C. Chiang;Takaaki Nomura
中科院分区：
文献类型：
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作者：
C. Chen;C. Chiang;Takaaki Nomura
我们提出了一种暗物质解释，以同时解释 AMS-02 实验中观察到的过量反质子到质子和正电子功率谱，同时具有正确的暗物质遗迹丰度并满足当前的直接搜索范围。我们用 SU (2) X 的隐藏规范对称性扩展了希格斯三重态模型，该对称性被四重态标量场破坏到 Z 3 ，从而使相关的规范玻色子成为稳定的弱相互作用大质量粒子暗物质候选者。通过耦合复杂的希格斯三重态和 SU (2) X 四重态，候选暗物质可以湮灭成三重态希格斯玻色子，每个希格斯玻色子又衰变成轻子或规范玻色子最终态。这种机制可以通过适当选择三线态真空期望值来校正过量的正电子和反质子。此外，该模型还提供了中微子质量和暗物质现象学之间的联系。
We propose a dark matter explanation to simultaneously account for the excess of antiproton-to-proton and positron power spectra observed in the AMS-02 experiment while having the right dark matter relic abundance and satisfying the current direct search bounds. We extend the Higgs triplet model with a hidden gauge symmetry of SU (2) X that is broken to Z 3 by a quadruplet scalar field, rendering the associated gauge bosons stable weakly-interacting massive particle dark matter candidates. By coupling the complex Higgs triplet and the SU (2) X quadruplet, the dark matter candidates can annihilate into triplet Higgs bosons each of which in turn decays into lepton or gauge boson final states. Such a mechanism gives rise to correct excess of positrons and antiprotons with an appropriate choice of the triplet vacuum expectation value. Besides, the model provides a link between neutrino mass and dark matter phenomenology.