arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.03629hep-ph
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两个含$U(1)'$的Higgs二重态模型中的味和CP破坏Higgs扇区

Flavor and CP-violating Higgs sector in two Higgs doublet models with $U(1)'$

Ligong Bian, Hyun Min Lee, Chan Beom Park

摘要:

我们研究了两个Higgs偶重态模型及其微观对应模型的有效理论中CP破坏问题的局部$U(1)'$对称性的作用。首先,在两个含$U(1)'$的Higgs二重态模型中,我们证明了标量势中的高维算符与混合质量参数的相互作用违反了CP对称性,从而导致CP偶标量和CP奇标量之间的小混合.受近年来$B$介子反常现象的启发,我们将味$U(1)'$作为描述味结构的基准模型。然后,我们计算了由于CP破坏的高维算符引起的两圈电子的电偶极矩(eEDM),并确定了重希格斯玻色子的质量与eEDM上的截止尺度之间的相关性.我们还评论的可能性,使一个独立的测试的CP破坏在对撞机搜索重希格斯玻色子玻色子。最后,我们展示了如何在有效的理论中得到的eEDM结果可以用来约束微观模型与明确的CP破坏在部分解耦或黑暗的部门。

英文摘要:

We investigate the role of a local $U(1)'$ symmetry for the problem of CP violation in the effective theory for two Higgs doublet models and its microscopic counterparts. First, in two Higgs doublet models with $U(1)'$, we show that the higher-dimensional operators in the scalar potential violate the CP symmetry with an interplay with the mixing mass parameter, giving rise to small mixings between CP-even and CP-odd scalars. Motivated by the $B$-meson anomalies in recent years, we take the flavored $U(1)'$ to be a benchmark model for specifying the flavor structure. Then, we calculate the electric dipole moment of electron (eEDM) at two loops due to the CP-violating higher-dimensional operators and identify the correlation between the masses of heavy Higgs bosons and the cutoff scale from the bound on eEDM. We also comment on the possibility of making an independent test of the CP violation in the collider searches for heavy Higgs bosons. Finally, we show how the obtained eEDM results in the effective theory can be used to constrain microscopic models with an explicit CP violation in the partially decoupled or dark sectors.

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