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arXiv 0711.4646hep-phastro-ph
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希格斯区规范单线态模型中的暗物质无菌中微子

Dark-matter sterile neutrinos in models with a gauge singlet in the Higgs sector

Kalliopi Petraki, Alexander Kusenko

摘要:

质量为几keV的不育中微子可以作为宇宙学上的暗物质,可以解释观测到的中微子速度,并在第一批恒星的形成中发挥重要作用。我们描述了具有扩展希格斯扇形的模型中无菌中微子的产生,其中马约拉纳质量项由规范单重态希格斯玻色子的真空期望值产生。在这个模型中,不育中微子的剩余丰度不一定取决于它们的混合角,自由流长度可以比由中微子振荡产生的暖暗物质小得多,因此,前面引用的一些界限不适用。希格斯扇区中规范单态的存在对电弱相变、重子生成以及即将在大型强子对撞机和线性对撞机上进行的实验具有重要意义。

英文摘要:

Sterile neutrino with mass of several keV can be the cosmological dark matter, can explain the observed velocities of pulsars, and can play an important role in the formation of the first stars. We describe the production of sterile neutrinos in a model with an extended Higgs sector, in which the Majorana mass term is generated by the vacuum expectation value of a gauge-singlet Higgs boson. In this model the relic abundance of sterile neutrinos does not necessarily depend on their mixing angles, the free-streaming length can be much smaller than in the case of warm dark matter produced by neutrino oscillations, and, therefore, some of the previously quoted bounds do not apply. The presence of the gauge singlet in the Higgs sector has important implications for the electroweak phase transition, baryogenesis, and the upcoming experiments at the Large Hadron Collider and a Linear Collider.

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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