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arXiv 2406.01030hep-phhep-ex
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规范 $U(1)_{L_α-L_β}$ 模型中的中微子可观测量:含两个希格斯二重态和一个单重态标量

Neutrino observables in gauged $U(1)_{L_α-L_β}$ models with two Higgs doublet and one singlet scalars

Yuanchao Lou, Takaaki Nomura

AI总结:

本文在含两个希格斯二重态和一个单重态标量的规范 $U(1)_{L_α-L_β}$ 模型中,通过I型跷跷板机制构建中微子质量矩阵,发现其质量之和可低于最小模型,并能拟合最小模型不利的情形,同时保持CP相位关联。

摘要:

我们讨论了在局域 $U(1)_{L_α- L_β}$ 对称性下,具有两个希格斯二重态和一个单重态标量场的模型中的中微子扇区。针对这些模型,我们构建了一个中微子质量矩阵,该矩阵通过引入右手中微子的I型跷跷板机制产生。与仅含一个新标量场的最小方案相比,该中微子质量矩阵具有更多的自由度,但其结构仍受对称性限制。我们发现,中微子质量之和可以低于最小方案,并且更容易满足观测约束。此外,对于在最小模型中不受青睐的 $U(1)_{L_e - L_{μ(τ)}}$ 情形,我们也能拟合中微子数据。尽管我们拥有更多自由参数,但仍发现中微子质量之和与CP破坏相位之间存在一些关联。

英文摘要:

We discuss neutrino sector in models with two Higgs doublet and one singlet scalar fields under local $U(1)_{L_α- L_β}$ symmetry. A neutrino mass matrix is formulated for these models where the matrix is generated via type-I seesaw mechanism introducing right-handed neutrinos. The neutrino mass matrix has more degrees of freedom compared to minimal scenarios which have only one new scalar field, but its structure is still restricted by the symmetry. Then it is find that sum of neutrino mass can be lower than minimal scenarios and it is easier to satisfy observed constraints. In addition, we can fit neutrino data for $U(1)_{L_e - L_{μ(τ)}}$ cases which are disfavored in minimal models. Furthermore, some correlations among sum of neutrino mass and CP violating phases are still found although we have more free parameters.

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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