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arXiv 1303.7356hep-ph
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双圈中微子模型中的多组分暗物质粒子

Multicomponent dark matter particles in a two-loop neutrino model

Yuji Kajiyama, Hiroshi Okada, Takashi Toma

摘要:

在具有规范U(1)_{B-L}对称性的TeV标度理论中,构造了一个环诱导的跷跷板模型.轻中微子的质量是在双圈水平上产生的,右手中微子的质量也是通过单圈效应产生的。由于B-L对称性破缺后的离散对称性和最初强加给模型的Z_2宇称,我们的模型包含了多组分的暗物质。我们研究了多分量DM的性质,其中我们有两个不同质量尺度的费米DM,O(10)GeV和O(100-1000)GeV。前者的质量对应于最轻的右手中微子的质量所诱导的环效应,虽然后者的SM规范单重费米子。我们显示每个DM湮灭过程,并比较观察遗迹丰度,连同轻子味破坏(LFV)和活动中微子质量的约束。此外,我们表明,我们的模型具有一定的参数范围所允许的直接探测结果的XENON 100报告,并有可能通过未来的XENON 100实验验证模型。

英文摘要:

We construct a loop induced seesaw model in a TeV scale theory with gauged U(1)_{B-L} symmetry. Light neutrino masses are generated at two-loop level and right-handed neutrinos also obtain their masses by one-loop effect. Multi-component Dark Matters (DMs) are included in our model due to the remnant discrete symmetry after the B-L symmetry breaking and the Z_2 parity which is originally imposed to the model. We investigate the multi-component DM properties, in which we have two fermionic DMs with different mass scales, O(10) GeV and O(100-1000) GeV. The former mass corresponds to the lightest right-handed neutrino mass induced by the loop effect, although the latter one to the SM gauge singlet fermion. We show each of the DM annihilation processes and compare to the the observation of relic abundance, together with the constraints of Lepton Flavor Violation (LFV) and active neutrino masses. Moreover we show that our model has some parameter region allowed by the direct detection result reported by XENON100, and it is possible to verify the model by the future XENON experiment.

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