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arXiv 2307.09595hep-ph
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规范$SU(2)_f$味转移

Gauge $SU(2)_f$ flavour transfers

Luc Darmé, Aldo Deandrea, Farvah Mahmoudi

AI总结:

本研究提出标准模型中非阿贝尔水平$SU(2)_f$味规范群的味转移构想,构建相关模型并分析唯象学,经数值拟合证实LHC轻子味破坏搜索的研究竞争力。

摘要:

我们提出了从嵌入标准模型味结构中的非阿贝尔水平$SU(2)_f$味规范群实现味转移的构想。质量处于数十GeV到多TeV范围的新型味矢量玻色子,不会引发通常对此类结构构成主要限制的大的味改变流和介子振荡。相反,主要限制来自我们将详细研究的“味转移”算符。本文提出了若干显式模型,并深入探讨了它们的研究前景,包括其在对撞机及低能实验中轻子和夸克 sector 的唯象学表现。最后,我们针对其中一种情形开展了完整的数值拟合,结果表明基于大型强子对撞机(LHC)的轻子味破坏搜索与强度前沿可观测量具有竞争力。

英文摘要:

We introduce the idea of flavour transfer from a non-abelian horizontal $SU(2)_f$ flavour gauge group embedded in the Standard Model flavour structure. The new flavour vector bosons, in the mass range from the tens of GeV to multi-TeV do not induce large flavour-changing currents and meson oscillations, which usually provide the dominant constraints on this type of structure. Instead, the dominant constraints arise from "flavour-transfer" operators that we will study in details. Several explicit models are presented and their prospects are thoroughly explored, including their phenomenology in the lepton and quark sectors at colliders and lower energy experiments. We finally perform a complete numerical fit in one such scenario, showing that LHC-based lepton-flavour violating searches are competitive with intensity frontier observables.

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