@Article{Antusch_etal2022,
author="Antusch, S.
and Figueroa, D. G.
and Marschall, K.
and Torrenti, F.",
title="Characterizing the postinflationary reheating history: Single daughter field with quadratic-quadratic interaction",
journal="Physical Review D",
year="2022",
publisher="Amer Physical Soc",
volume="105",
number="4",
pages="043532--36pp",
abstract="We study the evolution of the energy distribution and equation of state of the Universe from the end of inflation until the onset of either radiation domination (RD) or a transient period of matter domination (MD). We use both analytical techniques and lattice simulations. We consider two-field models where the inflaton (/) has a monomial potential after inflation V((/)) proportional to i(/) -- vip (p 4, and of order similar to 50{\%} for p 4. The system goes to MD at late times for p = 2, while it goes to RD for p > 2. In the later case, we can calculate exactly the number of e-folds until RD as a function of g2, and hence predict accurately inflationary observables like the scalar tilt ns and the tensor-to-scalar ratio r. In the scenario (ii), the energy is always transferred completely to X for p > 2, as long as its effective mass m2X = g2((/) -- v)2 is not negligible. For p = 2, the final ratio between the energy densities of X and (/) depends strongly on g2. For all p > 2, the system always goes to MD at late times.",
optnote="WOS:000767129500008",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5173), last updated on Mon, 28 Mar 2022 07:09:57 +0000",
issn="2470-0010",
doi="10.1103/PhysRevD.105.043532",
opturl="https://arxiv.org/abs/2112.11280",
opturl="https://doi.org/10.1103/PhysRevD.105.043532",
language="English"
}