Heating up Peccei-Quinn scale
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F23%3A00574588" target="_blank" >RIV/68378271:_____/23:00574588 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0367642" target="_blank" >https://hdl.handle.net/11104/0367642</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1475-7516/2023/05/048" target="_blank" >10.1088/1475-7516/2023/05/048</a>
Alternative languages
Result language
angličtina
Original language name
Heating up Peccei-Quinn scale
Original language description
We discuss production of QCD axion dark matter in a novel scenario, which assumes time-varying scale of Peccei-Quinn symmetry breaking. The latter decreases as the Universe's temperature at early times and eventually stabilises at a large constant value. Such behavior is caused by the portal interaction between the complex field carrying Peccei-Quinn charge and a Higgs-like scalar, which is in thermal equilibrium with primordial plasma. In this scenario, axions are efficiently produced during the parametric resonance decay of the complex Peccei-Quinn field, relaxing to the minimum of its potential in the radiation-dominated stage. Notably, this process is not affected by the Universe's expansion rate and allows to generate the required abundance of dark matter independently of an axion mass. Phenomenological constraints on the model parameter space depend on the number density of radial field fluctuations, which are also generically excited along with axions, and the rate of their thermalization in the primordial plasma. For the ratio of radial field and axion particles number densities larger than ∼ 0.01 at the end of parametric resonance decay, the combination of cosmological and astrophysical observations with the CAST limit confines the Peccei-Quinn scale to a narrow range of values ∼ 108 GeV, — this paves the way for ruling out our scenario with the near future searches for axions.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Cosmology and Astroparticle Physics
ISSN
1475-7516
e-ISSN
1475-7516
Volume of the periodical
2023
Issue of the periodical within the volume
5
Country of publishing house
US - UNITED STATES
Number of pages
24
Pages from-to
048
UT code for WoS article
001025317500004
EID of the result in the Scopus database
2-s2.0-85160557177