Work

Inflationary Prediction for Primordial Non-Gaussianity

Year: 2005

Type: article

Abstract: We extend the deltaN formalism so that it gives all of the stochastic properties of the primordial curvature perturbation zeta if the initial field perturbations are Gaussian. The calculation requires only the knowledge of some family of unperturbed universes. A formula is given for the normalization f(NL) of the bispectrum of zeta, which is the main signal of non-Gaussianity. Examples of the use of the formula are given, and its relation to cosmological perturbation theory is explained.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.95.121302

Authors: David H. Lyth, Yeinzon Rodríguez

Institutions: Lancaster University, Universidad Antonio Nariño

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Departamento Administrativo de Ciencia, Tecnología e Innovación (COLCIENCIAS), European Commission, Fundación para el futuro de Colombia

Award: G1577323325