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Statistical Anisotropy from Vector Curvaton in D-brane Inflation

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Statistical Anisotropy from Vector Curvaton in D-brane Inflation. / Dimopoulos, Konstantinos; Wills, Danielle; Zavala, Ivonne.

In: Nuclear Physics B, Vol. 868, No. 1, 01.03.2013, p. 120-155.

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Dimopoulos, Konstantinos ; Wills, Danielle ; Zavala, Ivonne. / Statistical Anisotropy from Vector Curvaton in D-brane Inflation. In: Nuclear Physics B. 2013 ; Vol. 868, No. 1. pp. 120-155.

Bibtex

@article{a42c613fcf0f43f6b2df18426da2ac10,
title = "Statistical Anisotropy from Vector Curvaton in D-brane Inflation",
abstract = "We investigate the possibility of embedding the vector curvaton paradigm in D-brane models of inflation in Type IIB string theory in a simple toy model. The vector curvaton is identified with the U(1) gauge field that lives on the world volume of a D3-brane, which may be stationary or undergoing general motion in the internal space. The dilaton is considered as a spectator field which modulates the evolution of the vector field. In this set up, the vector curvaton is able to generate measurable statistical anisotropy in the spectrum and bispectrum of the curvature perturbation assuming that the dilaton evolves as e^(-\phi)\propto a^2 where a(t) is the scale factor. Our work constitutes a first step towards exploring how such distinctive features may arise from the presence of several light fields that naturally appear in string theory models of cosmology. ",
keywords = "D-branes, vector curvaton",
author = "Konstantinos Dimopoulos and Danielle Wills and Ivonne Zavala",
year = "2013",
month = mar,
day = "1",
doi = "10.1016/j.nuclphysb.2012.11.010",
language = "English",
volume = "868",
pages = "120--155",
journal = "Nuclear Physics B",
issn = "0550-3213",
publisher = "ELSEVIER SCIENCE BV",
number = "1",

}

RIS

TY - JOUR

T1 - Statistical Anisotropy from Vector Curvaton in D-brane Inflation

AU - Dimopoulos, Konstantinos

AU - Wills, Danielle

AU - Zavala, Ivonne

PY - 2013/3/1

Y1 - 2013/3/1

N2 - We investigate the possibility of embedding the vector curvaton paradigm in D-brane models of inflation in Type IIB string theory in a simple toy model. The vector curvaton is identified with the U(1) gauge field that lives on the world volume of a D3-brane, which may be stationary or undergoing general motion in the internal space. The dilaton is considered as a spectator field which modulates the evolution of the vector field. In this set up, the vector curvaton is able to generate measurable statistical anisotropy in the spectrum and bispectrum of the curvature perturbation assuming that the dilaton evolves as e^(-\phi)\propto a^2 where a(t) is the scale factor. Our work constitutes a first step towards exploring how such distinctive features may arise from the presence of several light fields that naturally appear in string theory models of cosmology.

AB - We investigate the possibility of embedding the vector curvaton paradigm in D-brane models of inflation in Type IIB string theory in a simple toy model. The vector curvaton is identified with the U(1) gauge field that lives on the world volume of a D3-brane, which may be stationary or undergoing general motion in the internal space. The dilaton is considered as a spectator field which modulates the evolution of the vector field. In this set up, the vector curvaton is able to generate measurable statistical anisotropy in the spectrum and bispectrum of the curvature perturbation assuming that the dilaton evolves as e^(-\phi)\propto a^2 where a(t) is the scale factor. Our work constitutes a first step towards exploring how such distinctive features may arise from the presence of several light fields that naturally appear in string theory models of cosmology.

KW - D-branes, vector curvaton

U2 - 10.1016/j.nuclphysb.2012.11.010

DO - 10.1016/j.nuclphysb.2012.11.010

M3 - Journal article

VL - 868

SP - 120

EP - 155

JO - Nuclear Physics B

JF - Nuclear Physics B

SN - 0550-3213

IS - 1

ER -