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arXiv 2601.02808hep-ph
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双双态模型与复单态标量及多临界点原理

Two Higgs doublet model with a complex singlet scalar and Multi-critical Point Principle

Ochanomizu University(御茶水女子大学);Sun Yat-sen University (Zhuhai Campus)(中山大学(珠海校区))

Gi-Chol Cho, Chikako Idegawa, Chiaki Nose

AI总结:

本文研究了一个扩展了复单态标量的双双态模型,其中单态的虚部作为暗物质候选者。该模型中,三种中性希格斯玻色子的退化质量对于满足当前暗物质直接探测实验和希格斯搜索的约束至关重要。通过引入树级多点原理(MPP),分析其对标量势、暗物质现象学和电弱相变的影响,展示了树级MPP倾向于大SU(2)_L双态-单态混合参数,但仍然存在可行的参数区域以满足观测暗物质约束。此外,尽管树级MPP禁止了由树级驱动的一阶电弱相变,但通过热环效应可以诱导出强的一阶相变,与电弱原初恒星形成相容。

摘要:

我们研究了一个扩展了复单态标量的双双态模型,在其中单态的虚部作为暗物质(DM)候选者。在该模型中,三种中性希格斯玻色子的退化质量对于满足当前暗物质直接探测实验和希格斯搜索的约束至关重要。这被称为退化标量场景。为了为这种退化希格斯能谱提供理论动机,我们施加了树级多点原理(MPP),该原理要求电弱真空和单态真空退化,并分析其对标量势、暗物质现象学和电弱相变的影响。我们展示树级MPP倾向于大SU(2)_L双态-单态混合参数,这些参数与退化标量场景竞争。然而,我们证明仍然存在可行的参数区域,其中观测到的暗物质约束得以满足。此外,尽管树级MPP禁止了由树级驱动的一阶电弱相变,但我们展示热环效应可以诱导出强的一阶相变,这与电弱原初恒星形成相容。

英文摘要:

We study a two Higgs doublet model extended by a complex singlet scalar, in which the imaginary part of the singlet serves as a dark matter (DM) candidate. In this model, degenerate masses of the three neutral Higgs bosons are crucial for achieving consistency with current constraints from DM direct-detection experiments and Higgs searches. This is called the degenerate scalar scenario. To provide a theoretical motivation for such a degenerate Higgs spectrum, we impose the tree-level Multiple Point Principle (MPP), which requires the electroweak and singlet vacua to be degenerate, and analyze its implications for the scalar potential, DM phenomenology, and the electroweak phase transition. We show that the tree-level MPP favors large SU(2)$_L$ doublet-singlet mixing parameters, which compete with the degenerate scalar scenario. Nevertheless, we demonstrate that viable parameter regions still exist in which the observed DM constraints are satisfied. Furthermore, although the tree-level MPP forbids a tree-level-driven first-order electroweak phase transition, we show that thermal loop effects can induce a strong first-order transition compatible with electroweak baryogenesis.

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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