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Title: Suppression of parametric resonance and the viability of tachyonic preheating after multifield inflation

Abstract

We investigate the feasibility of explosive particle production via parametric resonance or tachyonic preheating in multifield inflationary models by means of lattice simulations. We observe a strong suppression of resonances in the presence of four-leg interactions between the inflaton fields and a scalar matter field, leading to insufficient preheating when more than two inflatons couple to the same matter field. This suppression is caused by a dephasing of the inflatons that increases the effective mass of the matter field. Including three-leg interactions leads to tachyonic preheating, which is not suppressed by an increase in the number of fields. If four-leg interactions are subdominant, we observe a slight enhancement of tachyonic preheating. Thus, in order for preheating after multifield inflation to be efficient, one needs to ensure that three-leg interactions are present. If no tachyonic contributions exist, we expect the old theory of reheating to be applicable.

Authors:
; ;  [1]
  1. Helsinki Institute of Physics, P.O. Box 64, FIN-00014 Helsinki (Finland) and APC, UMR 7164, 10 rue Alice Domon et Leonie Duquet, 75205 Paris Cedex 13 (France)
Publication Date:
OSTI Identifier:
21300941
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 79; Journal Issue: 12; Other Information: DOI: 10.1103/PhysRevD.79.123510; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; COMPUTERIZED SIMULATION; EFFECTIVE MASS; EXPLOSIVES; HEAT TREATMENTS; INHIBITION; INTERACTIONS; LATTICE FIELD THEORY; MATTER; PARTICLE PRODUCTION; RESONANCE; TACHYONS

Citation Formats

Battefeld, Diana, Battefeld, Thorsten, Giblin, Jr, John T, Princeton University, Department of Physics, New Jersey 08544, and Department of Physics and Astronomy, Bates College, 44 Campus Avenue, Lewiston, Maine 04240. Suppression of parametric resonance and the viability of tachyonic preheating after multifield inflation. United States: N. p., 2009. Web. doi:10.1103/PHYSREVD.79.123510.
Battefeld, Diana, Battefeld, Thorsten, Giblin, Jr, John T, Princeton University, Department of Physics, New Jersey 08544, & Department of Physics and Astronomy, Bates College, 44 Campus Avenue, Lewiston, Maine 04240. Suppression of parametric resonance and the viability of tachyonic preheating after multifield inflation. United States. https://doi.org/10.1103/PHYSREVD.79.123510
Battefeld, Diana, Battefeld, Thorsten, Giblin, Jr, John T, Princeton University, Department of Physics, New Jersey 08544, and Department of Physics and Astronomy, Bates College, 44 Campus Avenue, Lewiston, Maine 04240. Mon . "Suppression of parametric resonance and the viability of tachyonic preheating after multifield inflation". United States. https://doi.org/10.1103/PHYSREVD.79.123510.
@article{osti_21300941,
title = {Suppression of parametric resonance and the viability of tachyonic preheating after multifield inflation},
author = {Battefeld, Diana and Battefeld, Thorsten and Giblin, Jr, John T and Princeton University, Department of Physics, New Jersey 08544 and Department of Physics and Astronomy, Bates College, 44 Campus Avenue, Lewiston, Maine 04240},
abstractNote = {We investigate the feasibility of explosive particle production via parametric resonance or tachyonic preheating in multifield inflationary models by means of lattice simulations. We observe a strong suppression of resonances in the presence of four-leg interactions between the inflaton fields and a scalar matter field, leading to insufficient preheating when more than two inflatons couple to the same matter field. This suppression is caused by a dephasing of the inflatons that increases the effective mass of the matter field. Including three-leg interactions leads to tachyonic preheating, which is not suppressed by an increase in the number of fields. If four-leg interactions are subdominant, we observe a slight enhancement of tachyonic preheating. Thus, in order for preheating after multifield inflation to be efficient, one needs to ensure that three-leg interactions are present. If no tachyonic contributions exist, we expect the old theory of reheating to be applicable.},
doi = {10.1103/PHYSREVD.79.123510},
url = {https://www.osti.gov/biblio/21300941}, journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 12,
volume = 79,
place = {United States},
year = {2009},
month = {6}
}