New constraints on axion-gauge field dynamics during inflation from Planck and BICEP/Keck data sets
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F22%3A00567304" target="_blank" >RIV/68378271:_____/22:00567304 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0338563" target="_blank" >https://hdl.handle.net/11104/0338563</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1475-7516/2022/07/039" target="_blank" >10.1088/1475-7516/2022/07/039</a>
Alternative languages
Result language
angličtina
Original language name
New constraints on axion-gauge field dynamics during inflation from Planck and BICEP/Keck data sets
Original language description
We present new constraints on spectator axion-U(1) gauge field interactions during inflation using the latest Planck (PR4) and BICEP/Keck 2018 data releases. This model can source tensor perturbations from amplified gauge field fluctuations, driven by an axion rolling for a few e-folds during inflation. The gravitational waves sourced in this way have a strongly scale-dependent (and chiral) spectrum, with potentially visible contributions to large/intermediate scale B-modes of the CMB. We first derive theoretical bounds on the model imposing validity of the perturbative regime and negligible backreaction of the gauge field on the background dynamics. Then, we determine bounds from current CMB observations, adopting a frequentist profile likelihood approach. We study the behaviour of constraints for typical choices of the model's parameters, analyzing the impact of different dataset combinations.
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
<a href="/en/project/EF15_003%2F0000437" target="_blank" >EF15_003/0000437: Cosmology, Gravity and the Dark Sector of the Universe</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
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
2022
Issue of the periodical within the volume
7
Country of publishing house
GB - UNITED KINGDOM
Number of pages
33
Pages from-to
039
UT code for WoS article
000886089800002
EID of the result in the Scopus database
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