Fluid cosmology with decay and production of particles

Winfried Zimdahl; Diego Pavón

doi:10.1007/BF02106717

Fluid cosmology with decay and production of particles

Winfried Zimdahl, Diego Pavón

Department of Physics

Research output: Contribution to journal › Article › Research › peer-review

37 Citations (Scopus)

Abstract

We investigate the influence of particle number nonconserving processes on the thermal history and the dynamics of the universe. There occurs a backreaction both on the temperature and on the scale factor if particles of one species decay into particles of another species, or if the overall particle number changes. This backreaction is determined by the ratios of the relevant decay and production rates to the Hubble expansion rate. It results in reheating phenomena and modifications of the standard Friedmann-Lemaitre-Robertson-Walker (FLRW) expansion laws. A high production rate at the Planck scale tends to avoid the cosmological singularity. © 1994 Plenum Publishing Corporation.

Original language	English
Pages (from-to)	1259-1265
Journal	General Relativity and Gravitation
Volume	26
DOIs	https://doi.org/10.1007/BF02106717
Publication status	Published - 1 Dec 1994

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abstract = "We investigate the influence of particle number nonconserving processes on the thermal history and the dynamics of the universe. There occurs a backreaction both on the temperature and on the scale factor if particles of one species decay into particles of another species, or if the overall particle number changes. This backreaction is determined by the ratios of the relevant decay and production rates to the Hubble expansion rate. It results in reheating phenomena and modifications of the standard Friedmann-Lemaitre-Robertson-Walker (FLRW) expansion laws. A high production rate at the Planck scale tends to avoid the cosmological singularity. {\textcopyright} 1994 Plenum Publishing Corporation.",

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AU - Pavón, Diego

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AB - We investigate the influence of particle number nonconserving processes on the thermal history and the dynamics of the universe. There occurs a backreaction both on the temperature and on the scale factor if particles of one species decay into particles of another species, or if the overall particle number changes. This backreaction is determined by the ratios of the relevant decay and production rates to the Hubble expansion rate. It results in reheating phenomena and modifications of the standard Friedmann-Lemaitre-Robertson-Walker (FLRW) expansion laws. A high production rate at the Planck scale tends to avoid the cosmological singularity. © 1994 Plenum Publishing Corporation.

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DO - 10.1007/BF02106717

M3 - Article

SN - 0001-7701

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SP - 1259

EP - 1265

JO - General Relativity and Gravitation

JF - General Relativity and Gravitation

ER -

Fluid cosmology with decay and production of particles

Abstract

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