论文标题
$ B $异常在Electroweak Precision的镜头下
$B$ anomalies under the lens of electroweak precision
论文作者
论文摘要
在LEP和SLC进行的测量结果将我们投射到了Electroweak物理学的精确时代。这也与对LHCB的理论解释和Belle测量的理论解释有关，$ b $ neptonic衰减，通过推断Lepton普遍性的推断为$ r_ {k^{（*）}} $比率，为新物理学铺平了道路。这些风味异常的最简单解释 - 目前被Electroweak Precision Data避免了这些风味异常 - 符合最小风味的一环贡献。在这项工作中，我们讨论了如何完全缓解electroweak约束与违反$ r_ {k^{（*）}} $的最小风味解决方案之间的当前张力。我们确定标准模型有效领域理论中的相关性，该理论强调了这种可能性的存在。然后，我们考虑可以实现有效场理论图片的标准模型的最小扩展。我们讨论了$ b \ to s \ ell \ ell $异常的这些解决方案，尊重electroweak精度并且没有任何新的风味来源，可能会表明在TEV量表围绕LHC的潜力或leptoquark speactarios中存在$ z^{\ prime} $ boson。
The measurements carried out at LEP and SLC projected us into the precision era of electroweak physics. This has also been relevant in the theoretical interpretation of LHCb and Belle measurements of rare $B$ semileptonic decays, paving the road for new physics with the inference of lepton universality violation in $R_{K^{(*)}}$ ratios. The simplest explanation of these flavour anomalies -- sizeable one-loop contributions respecting Minimal Flavour Violation -- is currently disfavoured by electroweak precision data. In this work, we discuss how to completely relieve the present tension between electroweak constraints and one-loop minimal flavour violating solutions to $R_{K^{(*)}}$. We determine the correlations in the Standard Model Effective Field Theory that highlight the existence of such a possibility. Then, we consider minimal extensions of the Standard Model where our effective-field-theory picture can be realized. We discuss how these solutions to $b \to s \ell \ell$ anomalies, respecting electroweak precision and without any new source of flavour violation, may point to the existence of a $Z^{\prime}$ boson at around the TeV scale, within the discovery potential of LHC, or to leptoquark scenarios.
