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arXiv hep-ph/0403003hep-phastro-ph
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TeV右手中微子的唯象与暗物质模型

Phenomenology of TeV Right-handed Neutrino and the Dark Matter Model

Kingman Cheung, Osamu Seto

摘要:

在Krauss,Nasri和Trodden的TeV右手中微子模型中,亚电子伏特量级的中微子质量是通过一个3圈图产生的,其中的跷跷板质量被离散对称性所禁止,TeV质量的右手中微子同时也是冷暗物质的一个新的候选者.然而,我们表明,与一个单一的RH中微子是不可能产生两个质量平方差所需的振荡数据。我们通过引入一个TeV RH中微子扩展模型,并表明它是可能的,以满足修改后的模型内的振荡模式。在详细研究了来自暗物质、轻子味破坏、μ子反常磁矩和无中微子双β衰变的约束条件后,我们探索了参数空间,并得到了模型的预言。最后,我们研究了TeV RH中微子在TeV $e^+ e^-/μ^+ μ^-$对撞机上的产生和衰变特征。

英文摘要:

In a model of TeV right-handed (RH) neutrino by Krauss, Nasri, and Trodden, the sub-eV scale neutrino masses are generated via a 3-loop diagram with the vanishing see-saw mass forbidden by a discrete symmetry, and the TeV mass RH neutrino is simultaneously a novel candidate for the cold dark matter. However, we show that with a single RH neutrino it is not possible to generate two mass-square differences as required by the oscillation data. We extend the model by introducing one more TeV RH neutrino and show that it is possible to satisfy the oscillation pattern within the modified model. After studying in detail the constraints coming from the dark matter, lepton flavor violation and the muon anomalous magnetic moment, and the neutrinoless double beta decay, we explore the parameter space and derive predictions of the model. Finally, we study the production and decay signatures of the TeV RH neutrinos at TeV $e^+ e^-/μ^+ μ^-$ colliders.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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