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arXiv 0902.1537hep-ph
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双Higgs模型中的广义CP对称性和参数空间的特殊区域

Generalized CP symmetries and special regions of parameter space in the two-Higgs-doublet model

P. M. Ferreira, Howard E. Haber, Joao P. Silva

摘要:

我们认为,施加广义CP对称性的影响上的希格斯部门的两个希格斯偶极子模型,并确定三类对称性。其中两类将标量势参数约束到参数空间的一个例外区域,该区域要么遵守Z_2离散味对称性,要么遵守U(1)对称性。我们展示了一个基础不变量,区分这两种可能的对称性。我们还表明,施加这两类CP对称性的后果可以通过结合希格斯家族对称性来实现,而这对于通常的CP对称性是不可能的。我们评论的真空结构和重整化在这些对称性的存在。最后,我们证明了标准CP对称性可以用来建立我们确定的所有模型,包括那些基于希格斯家族对称性的模型。

英文摘要:

We consider the impact of imposing generalized CP symmetries on the Higgs sector of the two-Higgs-doublet model, and identify three classes of symmetries. Two of these classes constrain the scalar potential parameters to an exceptional region of parameter space which respects either a Z_2 discrete flavor symmetry or a U(1) symmetry. We exhibit a basis-invariant quantity that distinguishes between these two possible symmetries. We also show that the consequences of imposing these two classes of CP symmetry can be achieved by combining Higgs Family symmetries, and that this is not possible for the usual CP symmetry. We comment on the vacuum structure and on renormalization in the presence of these symmetries. Finally, we demonstrate that the standard CP symmetry can be used to build all the models we identify, including those based on Higgs Family symmetries.

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