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arXiv 2204.04737hep-ph
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具有CP破坏的赝Goldstone暗物质模型

Pseudo-Goldstone Dark Matter Model with CP violation

Neda Darvishi, Bohdan Grzadkowski

摘要:

我们考虑了一个具有两个Higgs二重态和一个复单重态标量的CP破坏模型。单重态$S$在整体$\rm U(1)$对称性下带电,该对称性被质量项$μ^2 S^2+\hc$软破缺。$S$的虚部是一个稳定的暗物质候选者,在树水平上,在零动量转移的极限下,它从满足暗物质散射截面上所有现有直接探测极限的核子中自然地分离出来。它明确表明,在这个框架内,在对齐限制CP违反仍然存在,相反,一个流行的版本的2-希格斯偶极子模型与软破$Z_2$对称性。在这种情况下,我们调查暗物质的影响,模型与无CP破坏的标量部门。特别地,计算了暗物质遗迹的丰度,并讨论了间接探测的可能性。

英文摘要:

We consider an explicitly CP-violating model with two Higgs doublets and one complex singlet scalar. The singlet $S$ is charged under a global $\rm U(1)$ symmetry which is softly broken by a mass term $μ^2 S^2+\hc$. Imaginary part of $S$ is a stable dark matter candidate which at the tree level, in the limit of zero momentum transfer, decouples from nucleons naturally satisfying all existing direct detection limits on dark matter scattering cross-section. It is explicitly shown that within this framework in the alignment limit CP-violation is still present in contrast to a popular version of a 2-Higgs doublet model with softly broken $Z_2$ symmetry. In this context, we investigate dark matter implications of the model both with and without CP violation in the scalar sector. In particular, dark matter relic abundance is calculated and the possibility for its indirect detection is discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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