A minimal axio-dilaton dark sector Article Swipe
Adam Smith
,
Maria Mylova
,
Philippe Brax
,
Carsten van de Bruck
,
C. P. Burgess
,
Anne-Christine Davis
·
YOU?
·
· 2025
· Open Access
·
· DOI: https://doi.org/10.1088/1475-7516/2025/07/023
YOU?
·
· 2025
· Open Access
·
· DOI: https://doi.org/10.1088/1475-7516/2025/07/023
In scalar-tensor theories it is the two-derivative sigma-model interactions that like to compete at low energies with the two-derivative interactions of General Relativity (GR) — at least once the dangerous zero-derivative terms of the scalar potential are suppressed (such as by a shift symmetry). But nontrivial two-derivative interactions require at least two scalars to exist and so never arise in the single-scalar models most commonly explored. Axio-dilaton models provide a well-motivated minimal class of models for which these self-interactions can be explored. We review this class of models and investigate whether these minimal two fields can suffice to describe both Dark Matter and Dark Energy. We find that they can — the axion is the Dark Matter and the dilaton is the Dark Energy — and that they robustly predict several new phenomena for the CMB and structure formation that can be sought in observations. These include specific types of Dark Energy evolution and small space- and time-dependent changes to particle masses post-recombination that alter the Integrated Sachs-Wolfe effect, cause small changes to structure growth and more.
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- Type
- article
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All OpenAlex metadata
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https://openalex.org/W4412148967Canonical identifier for this work in OpenAlex
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https://doi.org/10.1088/1475-7516/2025/07/023Digital Object Identifier
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A minimal axio-dilaton dark sectorWork title
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articleOpenAlex work type
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enPrimary language
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2025Year of publication
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2025-07-01Full publication date if available
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Adam Smith, Maria Mylova, Philippe Brax, Carsten van de Bruck, C. P. Burgess, Anne-Christine DavisList of authors in order
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https://doi.org/10.1088/1475-7516/2025/07/023Publisher landing page
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hybridOpen access status per OpenAlex
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https://doi.org/10.1088/1475-7516/2025/07/023Direct OA link when available
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Physics, Dilaton, Hidden sector, Dark matter, Dark energy, Theoretical physics, Particle physics, Cosmology, AstrophysicsTop concepts (fields/topics) attached by OpenAlex
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0Total citation count in OpenAlex
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