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Title: Anisotopic inflation with a non-abelian gauge field in Gauss-Bonnet gravity

Abstract

In presence of Gauss-Bonnet corrections, we study anisotropic inflation aided by a massless SU(2) gauge field where both the gauge field and the Gauss-Bonnet term are non-minimally coupled to the inflaton. In this scenario, under slow-roll approximations, the anisotropic inflation is realized as an attractor solution with quadratic forms of inflaton potential and Gauss-Bonnet coupling function. We show that the degree of anisotropy is proportional to the additive combination of two slow-roll parameters of the theory. The anisotropy may become either positive or negative similar to the non-Gauss-Bonnet framework, a feature of the model for anisotropic inflation supported by a non-abelian gauge field but the effect of Gauss-Bonnet term further enhances or suppresses the generated anisotropy.

Authors:
 [1]
  1. ZARM, University of Bremen, Am Falltrum, 28359 Bremen (Germany)
Publication Date:
OSTI Identifier:
22680099
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2017; Journal Issue: 01; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ADDITIVES; ANISOTROPY; APPROXIMATIONS; COMPUTERIZED SIMULATION; CORRECTIONS; COUPLING; FIELD THEORIES; GAUGE INVARIANCE; GRAVITATION; INFLATIONARY UNIVERSE; INFLATONS; SU-2 GROUPS

Citation Formats

Lahiri, Sayantani, E-mail: sayantani.lahiri@gmail.com. Anisotopic inflation with a non-abelian gauge field in Gauss-Bonnet gravity. United States: N. p., 2017. Web. doi:10.1088/1475-7516/2017/01/022.
Lahiri, Sayantani, E-mail: sayantani.lahiri@gmail.com. Anisotopic inflation with a non-abelian gauge field in Gauss-Bonnet gravity. United States. doi:10.1088/1475-7516/2017/01/022.
Lahiri, Sayantani, E-mail: sayantani.lahiri@gmail.com. Sun . "Anisotopic inflation with a non-abelian gauge field in Gauss-Bonnet gravity". United States. doi:10.1088/1475-7516/2017/01/022.
@article{osti_22680099,
title = {Anisotopic inflation with a non-abelian gauge field in Gauss-Bonnet gravity},
author = {Lahiri, Sayantani, E-mail: sayantani.lahiri@gmail.com},
abstractNote = {In presence of Gauss-Bonnet corrections, we study anisotropic inflation aided by a massless SU(2) gauge field where both the gauge field and the Gauss-Bonnet term are non-minimally coupled to the inflaton. In this scenario, under slow-roll approximations, the anisotropic inflation is realized as an attractor solution with quadratic forms of inflaton potential and Gauss-Bonnet coupling function. We show that the degree of anisotropy is proportional to the additive combination of two slow-roll parameters of the theory. The anisotropy may become either positive or negative similar to the non-Gauss-Bonnet framework, a feature of the model for anisotropic inflation supported by a non-abelian gauge field but the effect of Gauss-Bonnet term further enhances or suppresses the generated anisotropy.},
doi = {10.1088/1475-7516/2017/01/022},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 01,
volume = 2017,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2017},
month = {Sun Jan 01 00:00:00 EST 2017}
}