Direct detection experiments are the only way to obtain indisputable evidence of the existence of dark matter (DM) in the form of a particle. These experiments have been used to probe many extensions of the Standard Model (SM) that provide DM candidates. Experimental results like the latest ones from XENON1T lead to severe constraints in the parameter space of many of the proposed models. In a simple extension of the SM, the addition of a complex singlet to the SM content, one-loop corrections need to be taken into account because the tree-level cross section is proportional to the DM velocity, and therefore negligible. In this work we study the case of a DM particle with origin in a singlet but in a larger framework of an extension by an extra doublet together with the extra singlet providing the DM candidate. We show that in the region of interest of the present and future direct detection experiments, electroweak corrections are quite stable with a K-factor very close to one.

直接探测实验是获得以粒子形式存在暗物质 (DM) 的无可争辩证据的唯一方法。这些实验已被用于探索提供 DM 候选的标准模型 (SM) 的许多扩展。来自 XENON1T 的最新实验结果导致许多建议模型的参数空间受到严重限制。在 SM 的简单扩展中，在 SM 内容中添加了一个复杂的单线态，需要考虑单循环校正，因为树级横截面与 DM 速度成正比，因此可以忽略不计。在这项工作中，我们研究了起源于单峰的 DM 粒子的情况，但在更大的框架中，通过额外的双峰和提供 DM 候选的额外单峰扩展。K因子非常接近 1。