Observing primordial magnetic fields through Dark Matter
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F21%3A00554639" target="_blank" >RIV/68378271:_____/21:00554639 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1088/1475-7516/2021/02/011" target="_blank" >https://doi.org/10.1088/1475-7516/2021/02/011</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1475-7516/2021/02/011" target="_blank" >10.1088/1475-7516/2021/02/011</a>
Alternative languages
Result language
angličtina
Original language name
Observing primordial magnetic fields through Dark Matter
Original language description
Primordial magnetic fields are often thought to be the early Universe seeds that have bloomed into what we observe today as galactic and extra-galactic magnetic fields. Owing to their minuscule strength, primordial magnetic fields are very hard to detect in cosmological and astrophysical observations. We show how this changes if a part of neutral Dark Matter has a magnetic susceptibility. In this way, by studying Dark Matter one can obtain information about the properties of primordial magnetic fields, even if the latter have a comoving amplitude B-0 less than or similar to 0.01 nG. In our model Dark Matter is a stable singlet scalar x, which interacts with electromagnetism through the Rayleigh operator as chi(F mu nu F mu nu)-F-2/Lambda(2). For primordial magnetic fields present in the early Universe this operator forces the Z(2)-symmetry of the model to be spontaneously broken. Later, when the primordial magnetic field redshifts below a critical value, the symmetry is restored through an inverse phase transition. At that point the field chi begins to oscillate and acts as a magnetomorphic Dark Matter component, inheriting the properties of the primordial magnetic field space distribution. In particular, for a nearly flat spectrum of magnetic field fluctuations, the scalar chi carries a statistically anisotropic isocurvature mode. We discuss the parameter space of the model and consider the possibility that the bulk of the Dark Matter is composed of the same particles chi produced via the freeze-in mechanism.
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
10303 - Particles and field physics
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2021
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
2021
Issue of the periodical within the volume
2
Country of publishing house
GB - UNITED KINGDOM
Number of pages
26
Pages from-to
011
UT code for WoS article
000620675500011
EID of the result in the Scopus database
2-s2.0-85101546550