论文标题
与单个矢量leptoquark的$ B $ -Meson衰减异常的总体解释
A combined explanation of the $B$-meson decay anomalies with a single vector leptoquark
论文作者
论文摘要
由$ r_ {d^{（\ ast）}} $和$ r_ {k^{（\ ast）}} $ Anomalies在$ b $ decays中的$ r_ {d^{（\ ast）}}上的最新实验进度的动机，我们考虑单个矢量leptoquark field的标准模型。我们研究如何从先验通用量规耦合开始，如何实现所需的Lepton风味非宇宙性。虽然在$ su（2）_l $中断之后，夸克和叶子的大规模未对准的统一耦合风味结构不允许遵守违反Lepton风味的过程的严格界限，但我们发现，由于有效地与较重的媒介效率相结合，因此有效地与非独立的耦合相关，因此可以同时使用较重的效率。 $ r_ {k^{（\ ast）}} $和$ r_ {d^{（\ ast）}} $ anomalies。此外，在不久的将来，违反可观察到的充电Lepton风味的敏感性的预期进展应允许在这类矢量leptoquark模型中探测首选参数空间的大区域。
Motivated by the recent experimental progress on the $R_{D^{(\ast)}}$ and $R_{K^{(\ast)}}$ anomalies in $B$-decays, we consider an extension of the Standard Model by a single vector leptoquark field. We study how one can achieve the required lepton flavour non-universality, starting from a priori universal gauge couplings. While the unitary coupling flavour structure, induced by the mass misalignment of quarks and leptons after $SU(2)_L$ breaking, does not allow to comply with stringent bounds from lepton flavour violating processes, we find that effectively non-unitary couplings, due to mixings with heavy vector-like fermions, hold the key to simultaneously address the $R_{K^{(\ast)}}$ and $R_{D^{(\ast)}}$ anomalies. Furthermore, in the near future, the expected progress in the sensitivity on charged lepton flavour violating observables should allow to probe a large region of the preferred parameter space in this class of vector leptoquark models.
