Cosmological constraints on decaying axion-like particles: a global analysis

被引：31

作者：

Balazs, Csaba ^{[1
]}

Bloor, Sanjay ^{[2
]}

Gonzalo, Tomas E. ^{[3
,4
]}

Handley, Will ^{[5
,6
]}

Hoof, Sebastian ^{[4
,7
]}

Kahlhoefer, Felix ^{[3
,4
]}

Lecroq, Marie ^{[1
,8
]}

Marsh, David J. E. ^{[9
]}

Renk, Janina J. ^{[2
,10
,11
]}

Scott, Pat ^{[2
,11
]}

Stoecker, Patrick ^{[3
,12
]}

机构：

[1] Monash Univ, Sch Phys & Astron, Melbourne, Vic 3800, Australia

[2] Imperial Coll London, Blackett Lab, Dept Phys, Prince Consort Rd, London SW7 2AZ, England

[3] Rhein Westfal TH Aachen, Inst Theoret Particle Phys & Cosmol TTK, D-52056 Aachen, Germany

[4] Karlsruhe Inst Technol KIT, Inst Theoret Particle Phys TTP, D-76128 Karlsruhe, Germany

[5] Univ Cambridge, Cavendish Lab, JJ Thomson Ave, Cambridge CB3 0HE, England

[6] Univ Cambridge, Kavli Inst Cosmol, Madingley Rd, Cambridge CB3 0HA, England

[7] Georg August Univ Gottingen, Inst Astrophys & Geophys, Friedrich Hund Pl 1, D-37077 Gottingen, Germany

[8] Inst Astrophys Paris, 98 Bis Blvd Arago, F-75014 Paris, France

[9] Kings Coll London, Dept Phys, Theoret Particle Phys & Cosmol Grp, London WC2R 2LS, England

[10] AlbaNova Univ Ctr, Oskar Klein Ctr Cosmoparticle Phys, SE-10691 Stockholm, Sweden

[11] Univ Queensland, Sch Math & Phys, Brisbane, Qld 4072, Australia

[12] Karlsruhe Inst Technol KIT, Inst Astroparticle Phys IAP, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2022年 / 12期

基金：

澳大利亚研究理事会;

关键词：

particle physics-cosmology connection; axions; MICROWAVE BACKGROUND SPECTRUM; SUNYAEV-ZELDOVICH SIGNAL; HOT-MODEL; DISTORTIONS; RADIATION; TEMPERATURE; EVOLUTION; EMISSION; MATTER; MASS;

D O I：

10.1088/1475-7516/2022/12/027

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 104 and 1013 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 ACDM as well as several nuisance parameters. We find a lower bound on the ALP mass of around ma > 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.

引用

页数：46

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