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arXiv 0910.4068hep-ph
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自然双Higgs偶态模型

A Natural Two-Higgs-Doublet Model

B. Grzadkowski, P. Osland

摘要:

我们讨论的唯象后果,需要取消单圈二次发散修正标量质量内的两希格斯双重模型(2 HDM)。结果表明,惰性双态模型(IDM)不能满足相消的要求。考虑到现有的实验约束,一般2 HDM进行了分析。确定允许上述取消的参数空间中的允许区域。对于tanbeta \gsim 40,观察到标量玻色子质量之间的简并。讨论了标量势中CP破坏的可能性,确定了具有大量CP破坏的tanbeta- M_{H^\pm}区域.为了以最小的方式提供一个暗物质的源,引入并讨论了标量规范单态。该模型允许改善的小层次问题,通过解除最小标量希格斯玻色子玻色子质量和抑制一圈二次修正标量质量。因此,根据最轻标量的质量,源于自然性参数的截止值被提高到\gsim 15 TeV。

英文摘要:

We discuss phenomenological consequences of requiring the cancellation of one-loop quadratic divergences in corrections to scalar masses within Two-Higgs-Doublet Models (2HDM). It is shown that the Inert Doublet Model (IDM) can not accommodate the requirement of the cancellation. A general 2HDM is also analyzed taking into account existing experimental constraints. Allowed regions in the parameter space, permitting the above cancellation, are determined. A degeneracy between masses of scalar bosons is observed for tanbeta \gsim 40. The possibility for CP violation in the scalar potential is discussed and regions of tanbeta-M_{H^\pm} with substantial amount of CP violation are determined. In order to provide a source for dark matter in a minimal manner, a scalar gauge singlet is introduced and discussed. The model allows to ameliorate the little hierarchy problem by lifting the minimal scalar Higgs boson mass and by suppressing the one-loop quadratic corrections to scalar masses. The cutoff originating from the naturality arguments is therefore lifted to \gsim 15 TeV depending on the mass of the lightest scalar.

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