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Hidden regimes during preheating
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SYSNO ASEP 0522493 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Hidden regimes during preheating Author(s) Sengör, Gizem (FZU-D) ORCID Number of authors 1 Article number 043503 Source Title Physical Review D. - : American Physical Society - ISSN 2470-0010
Roč. 100, č. 4 (2019), s. 1-16Number of pages 16 s. Language eng - English Country US - United States Keywords scalars ; models ; scalar spectral Subject RIV BE - Theoretical Physics OECD category Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect) R&D Projects EF16_027/0008215 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support FZU-D - RVO:68378271 UT WOS 000478998000005 EID SCOPUS 85072195570 DOI 10.1103/PhysRevD.100.043503 Annotation The effective field theory (EFT) of preheating with scalar fields implies three types of derivative couplings between the inflaton and the reheating field. Two of these couplings lead to scales below which only one of the two species appear as the low energy modes. In this paper, the variety of low energy regimes in terms of the species they accommodate are explored by studying the scales introduced by the derivative couplings and the dispersion relations they lead to. It is noted that the EFT of two scalar fields can give rise to nontrivial sound speed for both the inflation and reheating sector, even at scales where the modes of both species propagate freely, suggesting the presence of additional heavy fields. The regimes where one of the species affects the dispersion relation of the other while not appearing as an effective mode itself are named as “hidden regimes” during preheating.
Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2020 Electronic address https://doi.org/10.1103/physrevd.100.043503
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