Effective field theory of waterfall in hybrid inflation
- 주제(키워드) cosmological perturbation theory , cosmological phase transitions , inflation
- 등재 SCIE, SCOPUS
- OA유형 All Open Access, Green
- 발행기관 Institute of Physics
- 발행년도 2022
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000193396
- 본문언어 영어
- Published As https://doi.org/10.1088/1475-7516/2022/07/021
초록/요약
We examine the validity of the classical approximation of the waterfall phase transition in hybrid inflation from an effective field theory (EFT) point of view. The EFT is constructed by integrating out the waterfall field fluctuations, up to one-loop order in the perturbative expansion. Assuming slow-roll conditions are obeyed, right after the onset of the waterfall phase, we find the backreaction of the waterfall field fluctuations to the evolution of the system can be dominant. In this case the classical approximation is completely spoiled. We derive the necessary constraint that ensures the validity of the EFT. © 2022 IOP Publishing Ltd and Sissa Medialab.
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