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Title: Entropy mode loops and cosmological correlations during perturbative reheating

Recently, it has been shown that during preheating the entropy modes circulating in the loops, which correspond to the inflaton decay products, meaningfully modify the cosmological correlation functions at superhorizon scales. In this paper, we determine the significance of the same effect when reheating occurs in the perturbative regime. In a typical two scalar field model, the magnitude of the loop corrections are shown to depend on several parameters like the background inflaton amplitude in the beginning of reheating, the inflaton decay rate and the inflaton mass. Although the loop contributions turn out to be small as compared to the preheating case, they still come out larger than the loop effects during inflation.
Authors:
;  [1]
  1. Department of Physics, Bo g-tilde aziçi University, 34342, Bebek, İstanbul (Turkey)
Publication Date:
OSTI Identifier:
22382023
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2015; Journal Issue: 01; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; AMPLITUDES; CORRECTIONS; CORRELATION FUNCTIONS; COSMOLOGICAL INFLATION; DAUGHTER PRODUCTS; DECAY; ENTROPY; MASS; SCALAR FIELDS