Aoki Mayumi, Kanemura Shinya, Seto Osamu
ICRR, University of Tokyo, Kashiwa 277-8582, Japan.
Phys Rev Lett. 2009 Feb 6;102(5):051805. doi: 10.1103/PhysRevLett.102.051805.
We propose an extended version of the standard model, in which neutrino oscillation, dark matter, and the baryon asymmetry of the Universe can be simultaneously explained by the TeV-scale physics without assuming a large hierarchy among the mass scales. Tiny neutrino masses are generated at the three-loop level due to the exact Z2 symmetry, by which the stability of the dark matter candidate is guaranteed. The extra Higgs doublet is required not only for the tiny neutrino masses but also for successful electroweak baryogenesis. The model provides discriminative predictions especially in Higgs phenomenology, so that it is testable at current and future collider experiments.
我们提出了标准模型的一个扩展版本，其中中微子振荡、暗物质和宇宙的重子不对称性可以由TeV尺度的物理过程同时解释，而无需假设质量尺度之间存在很大的层级结构。由于精确的Z2对称性，微小的中微子质量在三圈水平产生，由此保证了暗物质候选者的稳定性。额外的希格斯二重态不仅是产生微小中微子质量所必需的，也是成功实现弱电重子生成所必需的。该模型尤其在希格斯现象学方面提供了有区别性的预测，因此它在当前和未来的对撞机实验中是可检验的。
