通过非可逆选择规则调控轻子门户暗物质
Taming lepton portal dark matter by a non-invertible selection rule
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中文总结 AI 辅助
该研究针对轻子门户暗物质的味违反问题，提出基于$\text{Z}_5$对称性的$\text{Z}_2$规范构造，实现门户耦合单味主导，还探讨了I型跷跷板模型的味泄漏及通过Z玻色子衰变轻子味非普适性的实验探测。
中文摘要 AI 辅助
我们指出，非可逆选择规则可控制轻子门户暗物质中固有的味违反，该暗物质是一种弱相互作用大质量粒子候选者，能规避直接探测实验的严格约束。我们证明，普通的可逆对称性无法在容纳PMNS矩阵大混合角的同时抑制味违反门户耦合。随后，我们提出一种基于$\boldsymbol{\text{Z}_5}$对称性的$\boldsymbol{\text{Z}_2}$规范的简单构造，该构造可实现与PMNS混合矩阵一致的门户耦合单味主导。我们还讨论了I型跷跷板完备模型中可能的味泄漏，并研究了通过轻子可观测量对该模型的实验探测，尤其是Z玻色子衰变中的轻子味非普适性。
英文摘要
We point out that a non-invertible selection rule can control the flavor violation inherent in lepton portal dark matter, a weakly interacting massive particle candidate that can evade severe constraints from direct detection experiments. We show that ordinary invertible symmetries cannot suppress flavor-violating portal couplings while accommodating the large mixing angles in the PMNS matrix. We then present a simple construction based on the $\mathbb{Z}_2$ gauging of a $\mathbb{Z}_5$ symmetry, which realizes one-flavor dominance of the portal couplings consistently with the PMNS mixing matrix. We also discuss possible flavor leakage in a type-I seesaw completion and study experimental probes of the model through lepton observables, especially lepton flavor non-universality in $Z$ boson decays.
发表机构
- Faculty of Health Science, Kumamoto Health Science University（熊本保健科学大学健康科学部）
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