Scalar singlet dark matter in non-standard cosmologies

被引：61

作者：

Bernal, Nicolas ^{[1
]}

Cosme, Catarina ^{[2
,3
]}

Tenkanen, Tommi ^{[4
]}

Vaskonen, Ville ^{[5
]}

机构：

[1] Univ Antonio Narino, Ctr Invest, Carrera 3 Este 47A-15, Bogota, Colombia

[2] Univ Porto, Fac Ciencias, Dept Fis & Astron, Rua Campo Alegre 687, P-4169007 Porto, Portugal

[3] Ctr Fis Porto, Rua Campo Alegre 687, P-4169007 Porto, Portugal

[4] Queen Mary Univ London, Astron Unit, Mile End Rd, London E1 4NS, England

[5] NICPB, Ravala Pst 10, EE-10143 Tallinn, Estonia

来源：

EUROPEAN PHYSICAL JOURNAL C | 2019年 / 79卷 / 01期

基金：

英国科学技术设施理事会; 欧盟地平线“2020”;

关键词：

RELIC DENSITY; CONSTRAINTS; NUCLEON; MODEL;

D O I：

10.1140/epjc/s10052-019-6550-9

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

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.

引用

页数：11

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