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arXiv 2202.06968hep-ph
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暗物质有效场论及其在矢量暗物质中的应用

Dark Matter Effective Field Theory and an Application to Vector Dark Matter

Jason Aebischer, Wolfgang Altmannshofer, Elizabeth E. Jenkins, Aneesh V. Manohar

摘要:

标准模型有效场论(SMEFT)和低能有效场论(LEFT)可以通过加入额外的自旋为0、1/2和1的暗物质粒子来扩展,这些粒子在标准模型(SM)规范群下是单线态的。我们分类所有规范不变的相互作用在拉格朗日项的第六个维度,并提出了树级的匹配条件,在电弱尺度的两个理论。研究最广泛的暗物质模型,例如那些基于希格斯门或光子与暗光子之间的动力学混合的模型,都是基于与SM扇区的四维相互作用。我们考虑一个模型,其中暗矢量粒子具有$\mathbb{Z}_2$对称性,使得最轻的暗物质粒子是稳定的。与SM的主要相互作用是通过六维算子,涉及两个暗矢量场强度张量和电磁场强度张量。这个模型是一个可行的暗物质模型在冻结的情况下,为广泛的参数。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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