Trifinopoulos Sokratis
Physik-Institut, Universität Zürich, 8057 Zurich, Switzerland.
Eur Phys J C Part Fields. 2018;78(10):803. doi: 10.1140/epjc/s10052-018-6280-4. Epub 2018 Oct 3.
In the last few years, the ratios and of have reportedly exhibited significant deviations from the relevant standard model predictions, hinting towards a possible violation of Lepton Flavor Universality and a window to New Physics. We investigate to what extent the inclusion of R-parity violating couplings in the minimal supersymmetric standard model can provide a better fit to the anomalies simultaneously. We perform this analysis employing an approximate, non-abelian flavour symmetry, which features a natural explanation of the appropriate hierarchy of the R-parity violating couplings. We show that, under the requirement of a supersymmetric spectrum with much heavier left-handed doublet superpartners, our assumption favors a considerable enhancement in the tree-level charged-current , while the the anomalies induced by receive up to an approximate improvement. The consistency with all relevant low-energy constraints is assessed.
在过去几年中，据报道，(和)的比率与相关标准模型预测值存在显著偏差，这暗示着可能违反了轻子味普适性，并为新物理打开了一扇窗。我们研究了在最小超对称标准模型中纳入违反(R)宇称的耦合能在多大程度上同时更好地拟合这些反常现象。我们采用一种近似的非阿贝尔味对称性来进行此分析，这种对称性对违反(R)宇称的耦合的适当层级给出了自然的解释。我们表明，在超对称谱中左旋双重态超伙伴重得多的要求下，我们的假设有利于树图水平的带电流(的显著增强，而由)引起的反常现象最多可得到约(的改善。我们评估了与所有相关低能约束的一致性。
