期刊
EUROPEAN PHYSICAL JOURNAL C
卷 79, 期 1, 页码 -出版社
SPRINGER
DOI: 10.1140/epjc/s10052-019-6550-9
关键词
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资金
- Fundacao para a Ciencia e Tecnologia (FCT) [PD/BD/114453/2016]
- U.K. Science and Technology Facilities Council [ST/J001546/1]
- Estonian Research Council [IUT23-6]
- ERDF Centre of Excellence Project [TK133]
- Spanish MINECO [FPA2017-84543-P]
- European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie Grant [674896, 690575]
- Universidad Antonio Narino [2017239, 2018204]
- Fundação para a Ciência e a Tecnologia [PD/BD/114453/2016] Funding Source: FCT
We study production of dark matter (DM) in models with a non-standard expansion history. We consider both freeze-out and freeze-in mechanisms for producing the observed DM abundance in a model where the DM consists of scalar singlet particles coupled to the Standard Model sector via the Higgs portal. We show that a non-standard expansion phase can lead to a significant change in the DM abundance and therefore to observational ramifications. For example, for DM freeze-in the required portal coupling can be much larger, whereas for DM freeze-out much smaller values become allowed. We evaluate the relevant constraints and discuss prospects for direct detection of such DM.
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