Robust cosmological constraints on axion-like particles

被引：67

作者：

Depta, Paul Frederik ^{[1
]}

Hufnagel, Marco ^{[1
]}

Schmidt-Hoberg, Kai ^{[1
]}

机构：

[1] DESY, Notkestr 85, D-22607 Hamburg, Germany

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2020年 / 05期

关键词：

axions; big bang nucleosynthesis; cosmological parameters from CMBR; physics of the early universe; SEARCH; LIMITS;

D O I：

10.1088/1475-7516/2020/05/009

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Axion-like particles with masses in the keV-GeV range have a profound impact on the cosmological evolution of our Universe, in particular on the abundance of light elements produced during Big Bang Nucleosynthesis. The resulting limits are complementary to searches in the laboratory and provide valuable additional information regarding the validity of a given point in parameter space. A potential drawback is that altering the cosmological history may potentially weaken or even fully invalidate these bounds. The main objective of this article is therefore to evaluate the robustness of cosmological constraints on axion-like particles in the keV-GeV region, allowing for various additional effects which may weaken the bounds of the standard scenario. Employing the latest determinations of the primordial abundances as well as information from the cosmic microwave background we find that while bounds can indeed be weakened, very relevant robust constraints remain.

引用

页数：19

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