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arXiv 0707.0633hep-ph
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暗物质诱导的电弱对称性破缺

Electroweak Symmetry Breaking induced by Dark Matter

Thomas Hambye, Michel H. G. Tytgat

备注：
4 pages, no figure, one table
发表信息：
Phys.Lett.B659:651-655,2008
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摘要：

电弱对称性破缺（EWSB）的机制和暗物质（DM）的性质是当前高能物理研究中最重要的问题。由于天然的暗物质候选者是一种弱相互作用的大质量粒子或WIMP，质量在电弱标度附近，因此研究DM和EWSB密切相关的可能性显然是有意义的。在标准模型的一个非常简单的扩展，惰性双重模型的背景下，我们表明，暗物质可以发挥至关重要的作用，在打破电弱对称性。在这个模型中，暗物质是惰性标量偶极中最轻的成分。后者与标准模型的希格斯偶极子的耦合打破了单圈的电弱对称性，“一个拉科尔曼-温伯格”。暗物质的丰度、电弱对称性的破坏以及电弱精确测量的限制都可以通过施加（精确或近似的）保管对称性来适应。

英文摘要：

The mechanism behind Electroweak Symmetry Breaking (EWSB) and the nature of dark matter (DM) are currently among the most important issues in high energy physics. Since a natural dark matter candidate is a weakly interacting massive particle or WIMP, with mass around the electroweak scale, it is clearly of interest to investigate the possibility that DM and EWSB are closely related. In the context of a very simple extension of the Standard Model, the Inert Doublet Model, we show that dark matter could play a crucial role in the breaking of the electroweak symmetry. In this model, dark matter is the lightest component of an inert scalar doublet. The coupling of the latter with the Standard Model Higgs doublet breaks the electroweak symmetry at one-loop, "a la Coleman-Weinberg". The abundance of dark matter, the breaking of the electroweak symmetry and the constraints from electroweak precision measurements can all be accommodated by imposing an (exact or approximate) custodial symmetry.

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