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arXiv 2505.02408hep-phastro-ph.CO
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微扰论边缘的最简暗物质模型

The Simplest Dark Matter Model at the Edge of Perturbativity

Miguel Escudero, Thomas Hambye

备注：
5 pages, 3 figures. Comments are welcome. v2: matches published version in PLB. very minor modifications
发表信息：
Phys.Lett.B 868 (2025) 139696
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AI总结：

研究最简单态标量暗物质模型在LZ实验新限制下的微扰性，计算NLO修正后发现复标量模型被排除，实标量模型质量需大于约20 TeV，并指出直接探测灵敏度三倍提升可完全检验该模型。

摘要：

日益灵敏的直接探测暗物质实验正在检验WIMP暗物质参数空间的重要区域，并将许多模型推向多TeV能区。这引发了这些模型微扰性的问题。在此背景下，鉴于LZ实验的新限制，我们研究了最简热暗物质模型——与希格斯玻色子耦合的单态标量（实标量或复标量）——的现状。我们计算了直接探测率以及驱动热退耦的湮灭过程的次领头阶（NLO）修正。对于复标量情形，我们发现整个微扰区域已被直接探测排除。对于实标量情形，我们发现NLO下质量应大于约20 TeV，而领头阶（LO）极限为大于约30 TeV。我们强调，对WIMP自旋无关相互作用的三倍改进即可在微扰区域内完全检验实标量模型。最后，对于两种模型，在希格斯共振附近仍存在一个允许的（尽管狭窄的）区域，其中耦合是微扰的。

英文摘要：

Increasingly sensitive direct detection dark matter experiments are testing important regions of parameter space for WIMP dark matter and pushing many models to the multi-TeV regime. This brings into question the perturbativity of these models. In this context, and in light of the new limits from the LZ experiment, we investigate the status of the simplest thermal dark matter model: a singlet scalar, real or complex, coupled to the Higgs boson. We calculate the next-to-leading order (NLO) corrections to the direct detection rates as well as for the annihilations driving thermal freeze-out. For the complex case, we find that the entire perturbative region is excluded by direct detection. For the real case we find that the mass should be $\gtrsim 20\,{\rm TeV}$ at NLO, compared with the $\gtrsim 30\,{\rm TeV}$ LO limit. We highlight that a three-fold improvement on WIMP spin independent interactions can fully test the real scalar model in the perturbative regime. Finally, for both models, there is still an allowed (albeit narrow) region near the Higgs resonance where couplings are perturbative.

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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