论文标题
风味异常符合风味对称性
Flavour anomalies meet flavour symmetry
论文作者
论文摘要
We construct an extension of the Standard Model with a scalar leptoquark $ϕ\sim (3,1,-\tfrac13)$ and the discrete flavour symmetry $G_f=D_{17}\times Z_{17}$ to explain anomalies observed in charged-current semi-leptonic $B$ meson decays and in the muon anomalous magnetic moment, together with the charged fermion群众和夸克混合。 $ g_f $中包含的对称性$ z_ {17}^{\ rm diag} $仍然由leptoquark耦合以领先顺序保留，并有效地抑制了leptoquark的耦合，从而避免了第一代Quarks和/或电子，从而避免了许多严格的实验性实验性。参数空间的最强限制是通过辐射充电的Lepton风味损坏$τ\toμγ$和$μ\ toeγ$所施加的。一项详细的分析和数值研究表明，可以同时解释Lepton风味通用性比率$ R（D）$和$ R（D^\ Star）$和MUON异常磁矩的可行性，同时通过所有其他被认为的风味可观察到的实验界限。
We construct an extension of the Standard Model with a scalar leptoquark $ϕ\sim (3,1,-\tfrac13)$ and the discrete flavour symmetry $G_f=D_{17}\times Z_{17}$ to explain anomalies observed in charged-current semi-leptonic $B$ meson decays and in the muon anomalous magnetic moment, together with the charged fermion masses and quark mixing. The symmetry $Z_{17}^{\rm diag}$, contained in $G_f$, remains preserved by the leptoquark couplings, at leading order, and efficiently suppresses couplings of the leptoquark to the first generation of quarks and/or electrons, thus avoiding many stringent experimental bounds. The strongest constraints on the parameter space are imposed by the radiative charged lepton flavour violating decays $τ\toμγ$ and $μ\to eγ$. A detailed analytical and numerical study demonstrates the feasibility to simultaneously explain the data on the lepton flavour universality ratios $R(D)$ and $R(D^\star)$ and the muon anomalous magnetic moment, while passing the experimental bounds from all other considered flavour observables.
