CERN Theory Division, CH-1211 Geneva 23, Switzerland.
INFN-Sezione di Napoli, Via Cintia, 80126 Napoli, Italy.
Phys Rev Lett. 2015 Apr 17;114(15):151801. doi: 10.1103/PhysRevLett.114.151801. Epub 2015 Apr 14.
The LHC has observed, so far, 3 deviations from the Standard Model (SM) predictions in flavor observables: LHCb reported anomalies in B→Kμ(+)μ(-) and R(K)=B→Kμ(+)μ(-)/B→Ke(+)e(-), while CMS found an excess in h→μτ. We show, for the first time, how these deviations from the SM can be explained within a single well-motivated model: a two-Higgs-doublet model with gauged L(μ)-L(τ) symmetry. We find that, despite the constraints from τ→μμμ and B(s)-B¯(s) mixing, one can explain h→μτ, B→Kμ(+)μ(-) and R(K) simultaneously, obtaining interesting correlations among the observables.
截至目前，大型强子对撞机（LHC）已经观察到了 3 种偏离标准模型（SM）预测的现象：LHCb 报告了 B→Kμ(+)μ(-)和 R(K)=B→Kμ(+)μ(-)/B→Ke(+)e(-)中的异常，而 CMS 则发现了 h→μτ 的过剩。我们首次展示了如何在一个单一的有充分动机的模型内解释这些对 SM 的偏离：一个带有规范 L(μ)-L(τ)对称性的双 Higgs 双重模型。我们发现，尽管受到 τ→μμμ 和 B(s)-B¯(s)混合的限制，但人们仍然可以同时解释 h→μτ、B→Kμ(+)μ(-)和 R(K)，并获得这些可观测量之间的有趣相关性。
