Cosmological constraints on decaying axion-like particles: a global analysis
Cosmological constraints on decaying axion-like particles: a global analysis
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衰变类轴子粒子的宇宙学约束:全局分析
DOI:
10.1088/1475-7516/2022/12/027
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发表时间:
2022
影响因子:
6.4
通讯作者:
Balázs C
中科院分区:
文献类型:
--
作者:
Balázs C
Axion-like particles (ALPs) decaying into photons are known to affect a wide range of astrophysical and cosmological observables. In this study we focus on ALPs with masses in the keV–MeV range and lifetimes between 10 4 and 10 13 seconds, corresponding to decays between the end of Big Bang Nucleosynthesis and the formation of the Cosmic Microwave Background (CMB). Using the CosmoBit module of the global fitting framework GAMBIT, we combine state-of-the-art calculations of the irreducible ALP freeze-in abundance, primordial element abundances (including photodisintegration through ALP decays), CMB spectral distortions and anisotropies, and constraints from supernovae and stellar cooling. This approach makes it possible for the first time to perform a global analysis of the ALP parameter space while varying the parameters of ΛCDM as well as several nuisance parameters. We find a lower bound on the ALP mass of around m a> 300 keV, which can only be evaded if ALPs are stable on cosmological timescales. Future observations of CMB spectral distortions with a PIXIE-like mission are expected to improve this bound by two orders of magnitude.
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影响因子:
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作者:
Katsuhiko Sato;Humitaka Satō
通讯作者:
Humitaka Satō
影响因子:
6.3
作者:
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通讯作者:
A. Arbey
DOI:
--
发表时间:
1988
期刊:
影响因子:
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作者:
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通讯作者:
M. Yoshimura
DOI:
--
发表时间:
2020
期刊:
影响因子:
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作者:
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6.4
作者:
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通讯作者:
Hannestad Steen