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arXiv 1906.11297hep-phhep-ex
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μ子异常的完全类矢量第四族和新的$\mathrm{U(1)^\prime}$

Complete Vector-like Fourth Family and new $\mathrm{U(1)^\prime}$ for Muon Anomalies

Junichiro Kawamura, Stuart Raby, Andreas Trautner

摘要:

我们考虑的标准模型(SM),除了一个$\mathrm{U(1)^\prime}$规范对称性和一个完整的第四族夸克和轻子,这是矢量类相对于完整的$\mathrm{SU(3)_C}\times \mathrm{SU(2)_L} \times \mathrm{U(1)_Y}\times \mathrm{U(1)^\prime}$规范对称性。该模型提供了一个统一的解释实验异常$(g - 2)_μ$以及$b \rightarrow s \ell^+ \ell^-$衰变。我们找到了很好的适合从SM的偏差,而在同一时间拟合所有其他SM观测。该模型包括一个新的$Z^\prime$规范玻色子,一个$\mathrm{U(1)^\prime}$ -破缺标量,和矢量轻子都与几个$100$ GeV的顺序质量。它与所有目前发布的高能实验数据是一致的,然而,它似乎迫切需要通过精心设计的未来搜索进行测试。此外,精确的风味实验,特别是CKM基质元素的更准确的直接测定,将允许探测最佳拟合点。

英文摘要:

We consider the Standard Model (SM) with the addition of a $\mathrm{U(1)^\prime}$ gauge symmetry and a complete fourth family of quarks and leptons which are vector-like with respect to the full $\mathrm{SU(3)_C}\times \mathrm{SU(2)_L} \times \mathrm{U(1)_Y}\times \mathrm{U(1)^\prime}$ gauge symmetry. The model provides a unified explanation of experimental anomalies in $(g - 2)_μ$ as well as $b \rightarrow s \ell^+ \ell^-$ decays. We find good fits to the deviations from the SM, while at the same time fitting all other SM observables. The model includes a new $Z^\prime$ gauge boson, a $\mathrm{U(1)^\prime}$-breaking scalar, and vector-like leptons all with mass of order a few $100$ GeV. It is consistent with all currently released high energy experimental data, however, it appears imminently testable with well designed future searches. Also precision flavor experiments, especially more accurate direct determinations of CKM matrix elements, would allow to probe the best fit points.

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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