Journal Article

PUBDB-2026-01182

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Model implementations of axion dark matter from kinetic misalignment

Eroencel, C. (Corresponding author)DESY* ; Sato, R.DESY* ; Servant, G. ; Sørensen, P.Extern*

2025
IOP London

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Please use a persistent id in citations: doi:10.1088/1475-7516/2025/08/087  doi:10.3204/PUBDB-2026-01182

Report No.: CERN-TH-2024-093; DESY 23-194; OU-HET-1152; arXiv:2408.08355

Abstract: The axion kinetic misalignment mechanism (KMM) opens the possibility of explaining dark matter for almost any axion mass and decay constant that is not accessible by the standard misalignment mechanism, in particular at low values of the axion decay constant (i.e. large coupling). This is a new opportunity for most axion experiments which could be sensitive to dark matter and probe new regimes of axion cosmology.We scrutinise UV completions that lead to the KMM mechanism.These mainly rely on the early dynamics of the axion partner, the radial mode of the complex scalar field, from which the axion inherits kinetic energy. The damping of the radial-mode energy density is then a necessary ingredient. We study in detail thermal damping from interactions in the plasma.A minimal and rather natural implementation consists of a KSVZ-type model with a nearly-quadratic potential for the radial mode extended by U(1)-breaking higher-dimensional operators.Furthermore, we study Higgs portal interactions as an alternative damping mechanism and improve upon previously proposed implementations based on quartic potentials.These implementationscan lead to the QCD axion being dark matter and in the reach of IAXO, while MADMAX, IAXO and ALPS II can be sensitive to a generic Axion-Like-Particle (ALP) as dark matter. Such models typically feature a kination era. We also show that ALP dark matter from KMM points to a particular realization of inflation.

Keyword(s): axions ; cosmology of theories beyond the SM ; dark matter theory ; particle physics - cosmology connection

Note: cc-by

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Contributing Institute(s):

1. Theorie-Gruppe (T)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)
2. DFG project G:(GEPRIS)390833306 - EXC 2121: Das Quantisierte Universum II (390833306) (390833306)

Experiment(s):

1. No specific instrument

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF >= 5 ; JCR ; National-Konsortium ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Eröncel, C. (Corresponding author)DESY* ; Sato, R.DESY* ; Servant, G.DESY* ; Sørensen, P.
Model implementations of axion dark matter from kinetic misalignment
[10.3204/PUBDB-2023-07069]     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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