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arXiv 2208.03329hep-ph
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轴子Dirac跷跷板与电弱真空稳定性

Axionic Dirac seesaw and electroweak vacuum stability

J. T. Penedo, Yakefu Reyimuaji, Xinyi Zhang

摘要:

我们探讨了树级狄拉克中微子质量和轴子物理之间的连接的情况下,PQ对称性实施轻子数守恒微扰。要求PQ标度$f_a$是唯一的重标度在中微子质量产生中发挥作用,我们被引导到一个KSVZ型模型的建设狄拉克中微子质量成反比的$f_a$,提供一个真正的标量三重态(零超荷)被添加到SM标量部门。我们分析这个扩展的标量部门,专注于稳定的电弱真空。三重态VEV对$W$质量的贡献也可能是CDF合作最近暗示的超越SM物理学的原因。

英文摘要:

We explore the connection between tree-level Dirac neutrino masses and axion physics in a scenario where the PQ symmetry enforces lepton number conservation perturbatively. Requiring that the PQ scale $f_a$ is the only heavy scale to play a role in neutrino mass generation, we are led to the construction of a KSVZ-type model where Dirac neutrino masses are inversely proportional to $f_a$, provided a real scalar triplet (zero hypercharge) is added to the SM scalar sector. We analyse this extended scalar sector, focusing on the stabilisation of the electroweak vacuum. The contribution of the triplet VEV to the $W$ mass may also be responsible for the recent hint of beyond-the-SM physics by the CDF collaboration.

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