论文标题
朝向希格斯质量和衰减宽度，满足（n）MSSM中的对称性
Towards Higgs masses and decay widths satisfying the symmetries in the (N)MSSM
论文作者
论文摘要
在具有扩展希格斯扇区的模型（例如（n）MSSM）中，标量状态相互混合。然而，希格斯混合的概念在辐射水平上是有问题的，因为它同时引入了方案和仪表依赖性。特别是，希格斯质量和衰减幅度的定义可能会因存在高阶规范零件而受到损害。我们深入讨论此类效果的起源和幅度，并提出了保存或恢复规格不变性的两种策略。此外，与两点图有关的直观概念及其定义的简单性可以使在计算的这一侧包括高阶校正，无论顶点图中所达到的顺序如何。使用全局$ su（2）_ {\ mathrm {l}} $ - 对称限制的对称性，我们表明，在希格斯衰减的水平上，这种方法无法预期，但相反，相反，较高的术语可能会导致数值较大的微不足道的效果。
In models with an extended Higgs sector, such as the (N)MSSM, scalar states mix with one another. Yet, the concept of Higgs mixing is problematic at the radiative level, since it introduces both a scheme and a gauge dependence. In particular, the definition of Higgs masses and decay amplitudes can be impaired by the presence of gauge-violating pieces of higher order. We discuss in depth the origin and magnitude of such effects and suggest two strategies preserving or restoring gauge invariance. In addition, the intuitive concept of mixing and the simplicity of its definition in terms of two-point diagrams can make it tempting to include higher-order corrections on this side of the calculation, irrespectively of the order achieved in vertex diagrams. Using the global $SU(2)_{\mathrm{L}}$-symmetry in the decoupling limit, we show that no improvement can be expected from such an approach at the level of the Higgs decays, but that, on the contrary, the higher-order terms may lead to numerically large spurious effects.
