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arXiv 2602.17754hep-phhep-exhep-th
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在TeV尺度上生成费米子质量层级

Generating the fermion mass hierarchy at the TeV scale

Institute for Advanced Study(高等研究院);Princeton University(普林斯顿大学);University of California, Berkeley(加州大学伯克利分校);Lawrence Berkeley National Laboratory(劳伦斯伯克利国家实验室)

Nima Arkani-Hamed, Carolina Figueiredo, Lawrence J. Hall, Claudio Andrea Manzari

AI总结:

该研究提出了一类在TeV尺度上生成费米子质量层级的理论,通过向量状轻子和夸克的混合及杨-米尔斯耦合,避免了高能尺度的味和CP破坏效应,并探讨了其实验验证的可能性。

摘要:

我们提出了一类理论,用于生成夸克和轻子质量矩阵,其中新物理的尺度在TeV尺度上,而不诱导出通常被认为将味起源限制在约100TeV以上的大型味和CP破坏过程。这些模型包含新的向量状轻子和夸克,它们彼此有质量混合,并且通过类似于维度分解的“链”来编码与轻标准模型场的杨-米尔斯耦合。这些链中的局部性不仅生成了层级化的标准模型杨-米尔斯矩阵,还确保了CP和味破坏效应很小,即使在向量状粒子在TeV尺度上。一个简单的扩展也生成了中微子质量,其微小尺寸与电子杨-米尔斯耦合的平方参数性相关。我们概述了这些模型的基本特征,解释了费米子质量层级和混合角如何出现,并探讨了它们的现象学意义。该框架可以在LHC最终运行以及可能的未来在10TeV尺度上运行的碰撞机中得到检验,并且我们识别了一些与新向量状费米子的产生和衰变相关的独特实验特征。

英文摘要:

We propose a class of theories to generate quark and lepton mass matrices where the scale of new physics is at the TeV scale, without inducing the large flavor and CP violating processes that are often thought to relegate the origin of flavor to energies above $\sim 100$ TeV. The models have new vector-like leptons and quarks, with mass mixings to each other and Yukawa couplings to light Standard Model fields encoded in "chains" reminiscent of dimensional deconstruction. Locality in the chains both generates the hierarchical Standard Model Yukawa matrices, and ensures that CP and flavor violating effects are small, even with the vector-like particles at the TeV scale. A simple extension also generates neutrino masses, whose tiny size is parametrically related to the square of the electron Yukawa coupling. We outline the essential features of these models, explain how fermion mass hierarchies and mixing angles emerge, and explore their phenomenological implications. This framework can be tested both in the final run of the LHC as well as at possible future colliders operating at the 10 TeV scale, and we identify some of the distinctive experimental signatures associated with the production and decay of the new vector-like fermions.

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