Dilution of dark matter relic density in singlet extension models

doi:10.1007/JHEP02(2023)008

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	Dilution of dark matter relic density in singlet extension models
	Xiao, Yang 1,2; Yang, Jin Min 1,2; Zhang, Yang 1
刊名	JOURNAL OF HIGH ENERGY PHYSICS
	2023
期号	2 页码:8
关键词	PHASE-TRANSITION BARYOGENESIS SUPERSYMMETRY INFLATION UNIVERSE PROGRAM
ISSN号	1029-8479
DOI	10.1007/JHEP02(2023)008
英文摘要	We study the dilution of dark matter (DM) relic density caused by the electroweak first-order phase transition (FOPT) in the singlet extension models, including the singlet extension of the standard model (xSM), of the two-Higgs-doublet model (2HDM+S) and the next-to-minimal supersymmetric standard model (NMSSM). We find that in these models the entropy released by the strong electroweak FOPT can dilute the DM density to 1/3 at most. Nevertheless, in the xSM and NMSSM where the singlet field configure is relevant to the phase transition temperature, the strong FOPT always happens before the DM freeze-out, making the dilution effect negligible for the current DM density. We derive an analytical upper bound on the freeze-out temperature and a numerical lower bound on nucleation temperature in the xSM. On the other hand, in the 2HDM+S where the DM freeze-out temperature is independent of FOPT, the dilution may salvage some parameter space excluded by excessive DM relic density or by DM direct detections.
学科主题	Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27963]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Zhengzhou Univ, Sch Phys, Zhengzhou 45001, Peoples R China 2.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Xiao, Yang,Yang, Jin Min,Zhang, Yang. Dilution of dark matter relic density in singlet extension models[J]. JOURNAL OF HIGH ENERGY PHYSICS,2023(2):8.
APA	Xiao, Yang,Yang, Jin Min,&Zhang, Yang.(2023).Dilution of dark matter relic density in singlet extension models.JOURNAL OF HIGH ENERGY PHYSICS(2),8.
MLA	Xiao, Yang,et al."Dilution of dark matter relic density in singlet extension models".JOURNAL OF HIGH ENERGY PHYSICS .2(2023):8.