论文标题
调味轴和风味问题
Flavored axions and the flavor problem
论文作者
论文摘要
为了在标准模型〜（sm）夸克扇区生成一个逼真的质量矩阵ansatz，提出了Peccei-quinn〜（PQ）对称性，具有五个纹理 - 均方根。将我们的分析限制在Hermitian质量矩阵上，我们表明这需要至少4个Higgs Doublet。该模型允许为几个Yukawa耦合分配接近1的值，从而深入了解SM中质量尺度的原点。由于PQ电荷是非宇宙的，因此该模型在树级上具有改变风味的中性电流〜（FCNC）。从FCNC的分析表达式中，我们报告了从半抑制介子衰变的分支比例获得的参数空间中允许的区域。
A Peccei-Quinn~(PQ) symmetry is proposed in order to generate in the Standard Model~(SM) quark sector a realistic mass matrix ansatz with five texture-zeros. Limiting our analysis to Hermitian mass matrices, we show that this requires a minimum of 4 Higgs doublets. This model allows assigning values close to 1 for several Yukawa couplings, giving insight into the origin of the mass scales in the SM. Since the PQ charges are non-universal, the model features Flavor-Changing Neutral Currents~(FCNC) at the tree level. From the analytical expressions for the FCNC we report the allowed region in the parameter space obtained from the measurements of branching ratios of semileptonic meson decays.
