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Title: Model of inflation independent of the initial conditions, with bounded number of e-folds and n{sub s}larger or smaller than one

Abstract

We study a supergravity model of inflation essentially depending on one parameter which can be identified with the slope of the potential at the origin. In this type of models the inflaton rolls at high energy from negative values and a positive curvature potential. At some point defined by the equation {eta}=1 inflation starts. The potential curvature eventually changes to negative values and inflation ends when {eta}=-1. No spontaneous symmetry breaking type mechanism for inflation of the new type to occur is here required. The model naturally gives a bounded total number of e-folds which is typically close to the required number for observable inflation and it is independent of the initial conditions for the inflaton. The energy scale introduced is fixed by the amplitude of the anisotropies and is of the order of the supersymmetry breaking scale. The model can also accommodate a spectral index bigger or smaller than 1 without extreme fine tuning. We show that it is possible to obtain reasonable numbers for cosmological parameters and, as an example, we reproduce values obtained recently by Tegmark et al., from WMAP and SDSS data alone.

Authors:
 [1];  [2]
  1. Centro de Ciencias Fisicas, Universidad Nacional Autonoma de Mexico, Apartado Postal 48-3, 62251 Cuernavaca, Morelos (Mexico)
  2. Instituto de Fisica, Universidad Nacional Autonoma de Mexico, Apdo. Postal 20-364, 01000 Mexico D.F. (Mexico)
Publication Date:
OSTI Identifier:
20697992
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 70; Journal Issue: 10; Other Information: DOI: 10.1103/PhysRevD.70.103521; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; AMPLITUDES; ANISOTROPY; COSMOLOGY; FIELD EQUATIONS; INFLATIONARY UNIVERSE; POTENTIALS; SUPERGRAVITY; SUPERSYMMETRY; SYMMETRY BREAKING

Citation Formats

German, G., and Macorra, A. de la. Model of inflation independent of the initial conditions, with bounded number of e-folds and n{sub s}larger or smaller than one. United States: N. p., 2004. Web. doi:10.1103/PhysRevD.70.103521.
German, G., & Macorra, A. de la. Model of inflation independent of the initial conditions, with bounded number of e-folds and n{sub s}larger or smaller than one. United States. doi:10.1103/PhysRevD.70.103521.
German, G., and Macorra, A. de la. Mon . "Model of inflation independent of the initial conditions, with bounded number of e-folds and n{sub s}larger or smaller than one". United States. doi:10.1103/PhysRevD.70.103521.
@article{osti_20697992,
title = {Model of inflation independent of the initial conditions, with bounded number of e-folds and n{sub s}larger or smaller than one},
author = {German, G. and Macorra, A. de la},
abstractNote = {We study a supergravity model of inflation essentially depending on one parameter which can be identified with the slope of the potential at the origin. In this type of models the inflaton rolls at high energy from negative values and a positive curvature potential. At some point defined by the equation {eta}=1 inflation starts. The potential curvature eventually changes to negative values and inflation ends when {eta}=-1. No spontaneous symmetry breaking type mechanism for inflation of the new type to occur is here required. The model naturally gives a bounded total number of e-folds which is typically close to the required number for observable inflation and it is independent of the initial conditions for the inflaton. The energy scale introduced is fixed by the amplitude of the anisotropies and is of the order of the supersymmetry breaking scale. The model can also accommodate a spectral index bigger or smaller than 1 without extreme fine tuning. We show that it is possible to obtain reasonable numbers for cosmological parameters and, as an example, we reproduce values obtained recently by Tegmark et al., from WMAP and SDSS data alone.},
doi = {10.1103/PhysRevD.70.103521},
journal = {Physical Review. D, Particles Fields},
number = 10,
volume = 70,
place = {United States},
year = {Mon Nov 15 00:00:00 EST 2004},
month = {Mon Nov 15 00:00:00 EST 2004}
}