Heavy right-handed neutrino dark matter and PeV neutrinos at IceCube
Heavy right-handed neutrino dark matter and PeV neutrinos at IceCube
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DOI：
10.1088/1475-7516/2016/08/034
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发表时间：
2016-06
影响因子：
6.4
通讯作者：
P. Dev;D. Kazanas;R. Mohapatra;V. Teplitz;V. Teplitz;Yongchao Zhang;Yongchao Zhang
中科院分区：
文献类型：
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作者：
P. Dev;D. Kazanas;R. Mohapatra;V. Teplitz;V. Teplitz;Yongchao Zhang;Yongchao Zhang
讨论了一个简单的非超对称模型，该模型基于电弱规范群SU（2）L × SU（2）′ × U（1）B-L，其中最轻的右手中微子是SU（2）′轻子偶态的一部分，它们扮演着质量在多PeV范围内的长寿命不稳定暗物质的角色.我们使用共振s通道湮灭来获得正确的热遗迹密度，并放松暗物质质量的么正性约束。在这个模型中，存在一个产生τ轻子和中微子的三体暗物质衰变模式，这可能是冰立方实验中观察到的PeV级联事件的来源。该模型可以在未来的数据中用更精确的最高能量中微子事件的味道信息进行测试。
We discuss a simple non-supersymmetric model based on the electroweak gauge group SU(2)L × SU(2)′ × U(1)B–L where the lightest of the right-handed neutrinos, which are part of the leptonic doublet of SU(2)′, play the role of a long-lived unstable dark matter with mass in the multi-PeV range. We use a resonant s-channel annihilation to obtain the correct thermal relic density and relax the unitarity bound on dark matter mass. In this model, there exists a 3-body dark matter decay mode producing tau leptons and neutrinos, which could be the source for the PeV cascade events observed in the IceCube experiment. The model can be tested with more precise flavor information of the highest-energy neutrino events in future data.