论文标题
2HDM中的柔和破碎的对称性 - 一种不变的配方
Softly broken symmetries in the 2HDM -- an invariant formulation
论文作者
论文摘要
对称性的软折断需要较低尺寸部分的拉格朗日尺寸4部分和非平凡变化的尺寸4部分。但是，通常，DIM-4和较低维度的拉格朗日之间的分离在田间的基础转换方面并不是不变的。因此，出现了软对称破裂的物理意义的自然问题。此问题在两个higgs-doublet模型（2HDM）的框架中解决。在这些模型中，尽管歧义性与DIM-4和较低的Lagrangian之间的分离相对应的歧义，但软对称性破坏的含义仍可以用可观察到的含义，即它们是物理和可测量的。可以在通用2HDM的标量扇区上施加六个全局对称性。所有这些条件的必要且充分的树级条件已根据可观察到所有这些的软破裂。
Soft breaking of a symmetry requires an invariance of the dimension-4 part of the Lagrangian and non-trivial variation of the lower-dimensional part. However, in general, separation between the dim-4 and lower-dimensional Lagrangian is not invariant with respect to basis transformations of fields. Therefore, a natural question of the physical meaning of soft symmetry breaking arises. This problem is addressed here in the framework of two-Higgs-Doublet Models (2HDM). It has been shown, within these models, that in spite of the ambiguity corresponding to the separation between dim-4 and the lower-dimension Lagrangian, implications of the soft symmetry breaking could be formulated in terms of observables, i.e., they are physical and measurable. There are six global symmetries that can be imposed on the scalar sector of the generic 2HDM. Necessary and sufficient tree-level conditions for soft breaking of all of them have been formulated in terms of observables.
