Journal Article

PUBDB-2022-04149

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Fuzzy Dark Matter candidates from string theory

Cicoli, M. ; Guidetti, V.DESY* ; Righi, N. (Corresponding author)DESY* ; Westphal, A.DESY*

2022
SISSA [Trieste]

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Please use a persistent id in citations: doi:10.1007/JHEP05(2022)107  doi:10.3204/PUBDB-2022-04149

Report No.: DESY-21-153; arXiv:2110.02964

Abstract: String theory has been claimed to give rise to natural fuzzy dark matter candidates in the form of ultralight axions. In this paper we revisit this claim by a detailed study of how moduli stabilisation affects the masses and decay constants of different axion fields which arise in type IIB flux compactifications. We find that obtaining a considerable contribution to the observed dark matter abundance without tuning the axion initial misalignment angle is not a generic feature of 4D string models since it requires a mild violation of the Sf ≲ M$_{P}$ bound, where S is the instanton action and f the axion decay constant. Our analysis singles out C$_{4}$-axions, C$_{2}$-axions and thraxions as the best candidates to realise fuzzy dark matter in string theory. For all these ultralight axions we provide predictions which can be confronted with present and forthcoming observations.

Keyword(s): dark matter: fuzzy ; moduli: stability ; axion: decay constant ; compactification: flux ; instanton: action ; dimension: 4 ; Compactification and String Models ; Cosmology of Theories beyond the SM ; Superstring Vacua ; Fuzzy dark matter ; ultralight axions ; 4D string models

Note: 34 pages + 4 appendices, v2: minor changes, reviewed and extended results on C2 axions and thraxions, v3: improved final plot, additional background discussion, JHEP accepted version

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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. EXC 2121 - Das Quantisierte Universum (390833306) (390833306)
3. STRINGFLATION - Inflation in String Theory - Connecting Quantum Gravity with Observations (647995) (647995)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2022

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Database coverage:
; ; ; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; Nationallizenz ; SCOAP3 sponsored Journal ; 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 Cicoli, M. ; Guidetti, V. (Corresponding author)DESY* ; Righi, N.DESY* ; Westphal, A.DESY*
Fuzzy Dark Matter Candidates from String Theory
[10.3204/PUBDB-2021-03948]     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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