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

被引：1

作者：

Arcadi, Giorgio ^{[1
,2
]}

Cabo-Almeida, David ^{[1
,2
,3
,4
]}

Lebedev, Oleg ^{[5
,6
]}

机构：

[1] Univ Messina, Dipartimento Sci Matemat & Informat, Sci Fis & Sci Terra, Viale Ferdinando Stagno DAlcontres 31, I-98166 Messina, Sicily, Italy

[2] INFN, Sez Catania, Via Santa Sofia 64, I-95123 Catania, Sicily, Italy

[3] Univ Barcelona, Dept Fis Quant & Astrofis, Marti & Franques 1, E-08028 Barcelona, Catalunya, Spain

[4] Univ Barcelona, Inst Ciencies Cosmos ICCUB, Marti & Franques 1, E-08028 Barcelona, Catalunya, Spain

[5] Dept Phys, Gustaf Hallstromin katu 2a, FI-00014 Helsinki, Finland

[6] Helsinki Inst Phys, Gustaf Hallstromin Katu 2a, FI-00014 Helsinki, Finland

来源：

PHYSICS LETTERS B | 2025年 / 861卷

关键词：

D O I：

10.1016/j.physletb.2025.139268

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页数：8

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