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arXiv 0802.0060hep-ph
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具有CP破坏的双Higgs二重态模型中的三线性Higgs耦合

Trilinear Higgs couplings in the two Higgs doublet model with CP violation

Per Osland, P. N. Pandita, Levent Selbuz

摘要:

我们对具有CP破坏的一般双Higgs偶极模型进行了详细的分析。我们描述了该模型的两种不同的参数化,然后研究了这两种参数化下的希格斯玻色子质量和三线性希格斯耦合。在一个相当一般的模型中,我们发现三线性希格斯耦合有一个显着的依赖于模型的细节,即使最轻的希格斯玻色子玻色子的质量是一个固定的参数。在对希格斯玻色子质量和希格斯三线性耦合的分析中,我们在单圈有效势近似中加入了辐射修正。对两个希格斯偶极子模型的三线性耦合的单圈修正也显著依赖于模型的细节,并且可能相当大。我们定量地研究了三线性Higgs耦合,并表明,这些耦合通常是几倍大于相应的标准模型三线性Higgs耦合在某些区域的参数空间。我们还简要地讨论了双Higgs二重态模型的退耦极限。

英文摘要:

We carry out a detailed analysis of the general two Higgs doublet model with CP violation. We describe two different parametrizations of this model, and then study the Higgs boson masses and the trilinear Higgs couplings for these two parametrizations. Within a rather general model, we find that the trilinear Higgs couplings have a significant dependence on the details of the model, even when the lightest Higgs boson mass is taken to be a fixed parameter. We include radiative corrections in the one-loop effective potential approximation in our analysis of the Higgs boson masses and the Higgs trilinear couplings. The one-loop corrections to the trilinear couplings of the two Higgs doublet model also depend significantly on the details of the model, and can be rather large. We study quantitatively the trilinear Higgs couplings, and show that these couplings are typically several times larger than the corresponding Standard Model trilinear Higgs coupling in some regions of the parameter space. We also briefly discuss the decoupling limit of the two Higgs doublet model.

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