论文标题
暗物质有效的现场理论和对矢量暗物质的应用
Dark Matter Effective Field Theory and an Application to Vector Dark Matter
论文作者
论文摘要
标准模型有效场理论（SMEFT）和低能量有效场理论（左）可以通过添加额外的自旋0、1/2和1暗物质粒子来扩展，这些粒子是标准模型（SM）仪表组下的单元。我们将Lagrangian中的所有规格不变性相互作用分类为尺寸为6的术语，并在Electroweak量表上呈现两个理论之间的树级匹配条件。研究最广泛的暗物质模型，例如基于HIGGS门户或光子和暗光子之间的动力学混合的模型，基于与SM扇区的尺寸四个相互作用。我们考虑具有带有$ \ mathbb {z} _2 $对称性的暗矢量粒子的模型，以使最轻的暗物质粒子稳定。与SM的领先相互作用是通过尺寸六算子，涉及两个深色矢量场强度张量和电磁场 - 强度张量。对于广泛的参数，该模型是一个可行的暗物质模型。
The Standard Model Effective Field Theory (SMEFT) and the Low Energy Effective Field Theory (LEFT) can be extended by adding additional spin 0, 1/2 and 1 dark matter particles which are singlets under the Standard Model (SM) gauge group. We classify all gauge invariant interactions in the Lagrangian up to terms of dimension six, and present the tree-level matching conditions between the two theories at the electroweak scale. The most widely studied dark matter models, such as those based on the Higgs portal or on kinetic mixing between the photon and a dark photon, are based on dimension-four interactions with the SM sector. We consider a model with dark vector particles with a $\mathbb{Z}_2$ symmetry, so that the lightest dark matter particle is stable. The leading interaction with the SM is through dimension-six operators involving two dark vector field-strength tensors and the electromagnetic field-strength tensor. This model is a viable dark matter model in the freeze-in scenario for a wide range of parameters.
