Z′-mediated dark matter freeze-in at stronger coupling

IF 4.5 2区 物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS Physics Letters B Pub Date : 2025-02-01 DOI:10.1016/j.physletb.2025.139268
Giorgio Arcadi , David Cabo-Almeida , Oleg Lebedev
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Abstract

We study freeze-in production of fermionic dark matter mediated by a Z gauge boson. In particular, we explore the regime of Boltzmann-suppressed production, when the Standard Model (SM) thermal bath temperature never exceeds the dark matter mass. The corresponding gauge coupling is then required to be significant, up to order one. As a result, this class of freeze-in models can be probed by the current and future direct dark matter detection experiments.
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Z '介导的暗物质在更强的耦合下冻结
我们研究了由Z规玻色子介导的费米子暗物质的冻结生产。特别是,我们探索了当标准模型(SM)热浴温度从不超过暗物质质量时,玻尔兹曼抑制生产的制度。然后要求相应的压力表耦合具有显著性,最高可达1阶。因此,这类冻结模型可以通过当前和未来的直接暗物质探测实验来探测。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Physics Letters B
Physics Letters B 物理-物理:综合
CiteScore
9.10
自引率
6.80%
发文量
647
审稿时长
3 months
期刊介绍: Physics Letters B ensures the rapid publication of important new results in particle physics, nuclear physics and cosmology. Specialized editors are responsible for contributions in experimental nuclear physics, theoretical nuclear physics, experimental high-energy physics, theoretical high-energy physics, and astrophysics.
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