Multi-component Dark Matter and small scale structure formation

被引：4

作者：

Deal, Robert Wiley ^{[2
,3
]}

Sankharva, Kishan ^{[1
]}

Sinha, Kuver ^{[2
]}

Watson, Scott ^{[1
]}

机构：

[1] Syracuse Univ, Dept Phys, Syracuse, NY 13244 USA

[2] Univ Oklahoma, Dept Phys & Astron, Norman, OK 73019 USA

[3] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2024年 / 2024卷 / 02期

关键词：

Axions and ALPs; Cosmology of Theories BSM; Models for Dark Matter; String Models; COSMOLOGICAL IMPLICATIONS; SUPERSYMMETRY; INVARIANCE;

D O I：

10.1007/JHEP02(2024)085

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 consider the evolution of non-thermal dark matter perturbations in models which contain both Weakly Interacting Massive Particles (WIMPs) and axions. Using constraints from existing observations we examine the percentage of WIMPs and axions that may comprise the cosmological dark matter budget in models with an Early Matter Dominated Epoch (EMDE) - where entropy production is important. After carefully tracking the thermal evolution of the various species by solving the Boltzmann equations, we consider the enhancement of perturbations that may have led to early structure formation for axions and WIMPs. We investigate the impact of enhanced perturbations on the parameter space of both species, after imposing existing constraints from indirect detection experiments. Given these constraints we establish the feasibility of axions to form miniclusters in the early universe in EMDEs for a given percentage of allowed WIMPs. We find that EMDEs with low reheat temperatures near the BBN limit are preferred for axion minicluster formation. When the EMDE is caused by string moduli, the WIMP contribution to the relic density is set by the moduli branching to dark matter at the level of less than or similar to O\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ \mathcal{O} $$\end{document}(10-4).

引用

页数：33

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