Quark masses and mixings in minimally parameterized UV completions of the Standard Model

高阶导数的Lee-Wick统一

Higher-Derivative Lee-Wick Unification

我们考虑规范耦合统一的标准模型，其中包括高导二次项超出了最低要求集的李-威克扩展。我们确定了当某些标准模型粒子有两个Lee-Wick伙伴时，β函数是如何被修改的。我们表明，规范耦合统一可以在这样的模型中实现，而不需要引入额外的领域在较高的导数理论，我们评论可能的紫外线完成。

无规则框架下最小允许无中子双β衰变率

Minimally Allowed Neutrinoless Double Beta Decay Rates Within an Anarchical Framework

无中微子双β衰变是中微子马约拉纳性质的唯一现实的探针。在标准图中，它的速率与$m_{ee}$成正比，$m_{ee}$是味基中马约拉纳中微子质量矩阵的e-e元素。我探索最低限度允许$m_{ee}$值的质量矩阵无政府状态的框架内，中微子参数定义在低能量统计。混合角的分布由Haar积分测度很好地定义，但质量取决于任意的加权函数和边界条件。我调查的集成措施参数空间，并发现，充分收敛的权重，$m_{ee}$被限制在（0.01-0.4）eV在90%的置信度。来自中微子混合数据的限制降低了这些界限。奇异积分措施允许任意小的$m_{ee}$值与其余元素定义不清，但这种情况下约束的味道结构的模型的紫外线完成。低于$m_{ee} \sim 5\times10^{-3}$ eV的边界应该表明轻子扇区的对称性，新的光自由度或中微子的狄拉克性质。

Flavor models for $\bar{B} \to D^{(*)} τ\barν$

The ratio of the measured $\bar B\to D^{(*)}\ell\barν$ decay rates for $\ell = τ$ vs. $e,μ$ deviate from the Standard Model (SM) by about $4σ$. We show that the data are in tension with the SM, independent of form factor calculations, and we update the SM prediction for $\mathcal{B}(B\to X_cτ\barν) / \mathcal{B}(B\to X_c \ell\barν)$. We classify the operators that can accommodate the measured central values, as well as their UV completions. We identify models with leptoquark mediators that are minimally flavor violating in the quark sector, and are minimally flavor violating or $τ$-aligned in …