Scalar singlet dark matter in non-standard cosmologies

被引：0
作者：
Nicolás Bernal
Catarina Cosme
Tommi Tenkanen
Ville Vaskonen
机构：
[1] Universidad Antonio Nariño,Centro de Investigaciones
[2] Faculdade de Ciências da Universidade do Porto and Centro de Física do Porto,Departamento de Física e Astronomia
[3] Queen Mary University of London,Astronomy Unit
[4] NICPB,undefined
来源：
The European Physical Journal C | 2019年 / 79卷
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摘要：
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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