arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.08606hep-ph
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基于Higgs和Flavor入口的渐近安全模型的建立

Model Building from Asymptotic Safety with Higgs and Flavor Portals

Gudrun Hiller, Clara Hormigos-Feliu, Daniel F. Litim, Tom Steudtner

摘要:

我们执行一个全面的搜索标准模型扩展的启发渐近安全。我们的模型具有单线态矩阵标量场,三代矢量轻子,并通过新的汤川和门户耦合直接链接到希格斯和风味部门。一个新的特点是,扩大标量部门可能会自发地打破轻子味普适性。我们提供了一个完整的双回路重整化群分析的运行规范,汤川,四次耦合,找到紫外线固定点和BSM临界面的参数,$i.e.$的边界条件在TeV尺度的模型保持良好的行为和预测普朗克尺度没有遇到朗道极点或不稳定性。这包括渐近安全的标准模型扩展的模板,这些扩展与规范耦合和希格斯粒子、顶部和底部质量的测量值相匹配。我们进一步详细的现象,我们的模型,包括生产,衰变,费米子混合,异常磁矩,标量混合和手征增强的影响,和约束模型参数的数据。在质子质子和轻子对撞机的签名,如轻子味违反和位移顶点,和电偶极矩或带电轻子味违反型过程的前景,也表明。

英文摘要:

We perform a comprehensive search for Standard Model extensions inspired by asymptotic safety. Our models feature a singlet matrix scalar field, three generations of vector-like leptons, and direct links to the Higgs and flavor sectors via new Yukawa and portal couplings. A novel feature is that the enlarged scalar sector may spontaneously break lepton flavor universality. We provide a complete two-loop renormalization group analysis of the running gauge, Yukawa, and quartic couplings to find ultraviolet fixed points and the BSM critical surface of parameters, $i.e.$ the set of boundary conditions at the TeV scale for which models remain well-behaved and predictive up to the Planck scale without encountering Landau poles or instabilities. This includes templates for asymptotically safe Standard Model extensions which match the measured values of gauge couplings and the Higgs, top, and bottom masses. We further detail the phenomenology of our models covering production, decay, fermion mixing, anomalous magnetic moments, effects from scalar mixing and chiral enhancement, and constraints on model parameters from data. Signatures at proton-proton and lepton colliders such as lepton flavor violation and displaced vertices, and the prospect for electric dipole moments or charged lepton-flavor-violating type processes, are also indicated.

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