skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Curvature perturbation and waterfall dynamics in hybrid inflation

Abstract

We investigate the parameter spaces of hybrid inflation model with special attention paid to the dynamics of waterfall field and curvature perturbations induced from its quantum fluctuations. Depending on the inflaton field value at the time of phase transition and the sharpness of the phase transition inflation can have multiple extended stages. We find that for models with mild phase transition the induced curvature perturbation from the waterfall field is too large to satisfy the COBE normalization. We investigate the model parameter space where the curvature perturbations from the waterfall quantum fluctuations vary between the results of standard hybrid inflation and the results obtained here.

Authors:
 [1];  [2];  [3]
  1. Department of Physics, Sharif University of Technology, Tehran (Iran, Islamic Republic of)
  2. School of Physics, Institute for Research in Fundamental Sciences (IPM), P.O. Box 19395-5531, Tehran (Iran, Islamic Republic of)
  3. Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502 (Japan)
Publication Date:
OSTI Identifier:
22280226
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2011; Journal Issue: 10; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COSMOLOGY; DISTURBANCES; FLUCTUATIONS; INFLATIONARY UNIVERSE; INFLATONS; PHASE TRANSFORMATIONS; SPACE

Citation Formats

Abolhasani, Ali Akbar, Firouzjahi, Hassan, and Sasaki, Misao, E-mail: abolhasani@mail.ipm.ir, E-mail: firouz@mail.ipm.ir, E-mail: misao@yukawa.kyoto-u.ac.jp. Curvature perturbation and waterfall dynamics in hybrid inflation. United States: N. p., 2011. Web. doi:10.1088/1475-7516/2011/10/015.
Abolhasani, Ali Akbar, Firouzjahi, Hassan, & Sasaki, Misao, E-mail: abolhasani@mail.ipm.ir, E-mail: firouz@mail.ipm.ir, E-mail: misao@yukawa.kyoto-u.ac.jp. Curvature perturbation and waterfall dynamics in hybrid inflation. United States. doi:10.1088/1475-7516/2011/10/015.
Abolhasani, Ali Akbar, Firouzjahi, Hassan, and Sasaki, Misao, E-mail: abolhasani@mail.ipm.ir, E-mail: firouz@mail.ipm.ir, E-mail: misao@yukawa.kyoto-u.ac.jp. Sat . "Curvature perturbation and waterfall dynamics in hybrid inflation". United States. doi:10.1088/1475-7516/2011/10/015.
@article{osti_22280226,
title = {Curvature perturbation and waterfall dynamics in hybrid inflation},
author = {Abolhasani, Ali Akbar and Firouzjahi, Hassan and Sasaki, Misao, E-mail: abolhasani@mail.ipm.ir, E-mail: firouz@mail.ipm.ir, E-mail: misao@yukawa.kyoto-u.ac.jp},
abstractNote = {We investigate the parameter spaces of hybrid inflation model with special attention paid to the dynamics of waterfall field and curvature perturbations induced from its quantum fluctuations. Depending on the inflaton field value at the time of phase transition and the sharpness of the phase transition inflation can have multiple extended stages. We find that for models with mild phase transition the induced curvature perturbation from the waterfall field is too large to satisfy the COBE normalization. We investigate the model parameter space where the curvature perturbations from the waterfall quantum fluctuations vary between the results of standard hybrid inflation and the results obtained here.},
doi = {10.1088/1475-7516/2011/10/015},
journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 10,
volume = 2011,
place = {United States},
year = {2011},
month = {10}
}