中文

卡比博异常与电弱精确检验:标准模型扩展的探究

高能物理 - 唯象学 2021-02-10 v4

摘要

从不同来源对 VusV_{us} 的测定之间出现了一种新的张力(称为卡比博异常),新的 R(Vus)R(V_{us}) 可观测量清晰地展示了这一点。我们从标准模型有效场论的角度探究这一可观测量,并表明在简单的单算符主导情形下,R(Vus)R(V_{us}) 与现有电弱精确可观测量(EWPO)之间存在差异。我们探究了标准模型所有可能产生卡比博异常效应的单粒子扩展,并展示它们无法调和当前数据。我们进一步考察了 ILC 或 FCC-ee 实验上 EWPO 的未来前景,并讨论了特定电弱可观测量变化对该张力的影响。

关键词

引用

@article{arxiv.2008.03261,
  title  = {Cabibbo anomaly versus electroweak precision tests: An exploration of extensions of the Standard Model},
  author = {Matthew Kirk},
  journal= {arXiv preprint arXiv:2008.03261},
  year   = {2021}
}

备注

v2: Add acknowledgements, improved discussion in Sections 2.1 and 6.1, small numerical updates to Table 3 and Figures 5 and 6, conclusions unchanged. v3: results for L1 vector corrected due to bug in code, other conclusions unchanged. v4: Journal version - discussion improvements in introduction, secs. 2 and 3, improved analysis, plots, and discussion of fermion BSM models to clarify viable models