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arXiv 0904.3829hep-ph
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中微子质量、暗物质和重子不对称性的TeV标度物理模型及其唯象

A Model of TeV Scale Physics for Neutrino Mass, Dark Matter and Baryon Asymmetry and its Phenomenology

Mayumi Aoki, Shinya Kanemura, Osamu Seto

摘要:

本文讨论了文献\cite{aks-prl}中提出的模型的一些细节,在这个模型中,宇宙的中微子振荡、暗物质和重子不对称性可以同时用TeV尺度物理来解释,而不需要引入很高的质量尺度.引入了一个精确的离散$Z_2$对称性,在此对称性下,新的粒子内容(一个实单重标量场、一对带电单重标量场和TeV尺度的右手中微子)被指定为具有奇数量子数,而普通的规范场、夸克和轻子以及两个Higgs二重态是偶数.由于精确的$Z_2$对称性,微小的中微子质量在三圈水平上产生,从而也保证了暗物质候选者的稳定性。额外的希格斯双重态不仅对微小的中微子质量是必需的,而且对成功的电弱重子生成也是必需的。我们讨论了模型的唯象性质,发现在现有实验数据的约束下,存在同时解决上述三个问题的成功方案。然后,我们讨论在这种情况下,在正在进行的和未来的实验预测。结果表明,该模型提供了判别性的预测,特别是在希格斯物理和暗物质物理,使它在不久的将来是可检验的。

英文摘要:

We discuss some details for the model proposed in Ref. \cite{aks-prl}, in which neutrino oscillation, dark matter, and baryon asymmetry of the Universe can be simultaneously explained by the TeV-scale physics without introducing very high mass scales. An exact discrete $Z_2$ symmetry is introduced, under which new particle contents (a real singlet scalar field, a pair of charged singlet scalar fields and TeV-scale right-handed neutrinos) are assigned to have odd quantum number, whereas ordinary gauge fields, quarks and leptons, and two Higgs doublets are even. Tiny neutrino masses are generated at the three loop level due to the exact $Z_2$ symmetry, by which stability of the dark matter candidate is also guaranteed. The extra Higgs doublet is required not only for the tiny neutrino masses but also for successful electroweak baryogenesis. We discuss phenomenological properties of the model, and find that there are successful scenarios in which above three problems are solved simultaneously under the constraint from current experimental data. We then discuss predictions in such scenarios at ongoing and future experiments. It turns out that the model provides discriminative predictions especially in Higgs physics and dark matter physics, so that it is testable in near future.

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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