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Title: Decaying into the thermal medium in the early Universe

Abstract

We calculate the dissipation rate of a coherent scalar field oscillation in a thermal environment such as in the late reheating stage after inflation using nonequilibrium quantum field theory. It is shown that the dissipation rate is nonvanishing even when the decay products have a larger thermal mass than the oscillating scalar field, and its cosmological implications are discussed.

Authors:
 [1]
  1. Research Center for the Early Universe (RESCEU), University of Tokyo, Tokyo 113-0033 (Japan)
Publication Date:
OSTI Identifier:
20729222
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 805; Journal Issue: 1; Conference: PASCOS 2005: 11. international symposium on particles, strings, and cosmology, Gyeongju (Korea, Republic of), 30 May - 4 Jun 2005; Other Information: DOI: 10.1063/1.2149680; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; COSMOLOGY; INFLATIONARY UNIVERSE; OSCILLATIONS; QUANTUM FIELD THEORY; SCALAR FIELDS; THERMAL MASS; UNIVERSE

Citation Formats

Yokoyama, Jun'ichi. Decaying into the thermal medium in the early Universe. United States: N. p., 2005. Web. doi:10.1063/1.2149680.
Yokoyama, Jun'ichi. Decaying into the thermal medium in the early Universe. United States. doi:10.1063/1.2149680.
Yokoyama, Jun'ichi. Fri . "Decaying into the thermal medium in the early Universe". United States. doi:10.1063/1.2149680.
@article{osti_20729222,
title = {Decaying into the thermal medium in the early Universe},
author = {Yokoyama, Jun'ichi},
abstractNote = {We calculate the dissipation rate of a coherent scalar field oscillation in a thermal environment such as in the late reheating stage after inflation using nonequilibrium quantum field theory. It is shown that the dissipation rate is nonvanishing even when the decay products have a larger thermal mass than the oscillating scalar field, and its cosmological implications are discussed.},
doi = {10.1063/1.2149680},
journal = {AIP Conference Proceedings},
number = 1,
volume = 805,
place = {United States},
year = {Fri Dec 02 00:00:00 EST 2005},
month = {Fri Dec 02 00:00:00 EST 2005}
}
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