Inflationary prediction for primordial non-gaussianity = La prediccion inflacionaria acerca de la no-gaussianidad primordial
We extend the Infinite N formalism so that it gives all of the stochastic properties of the primordial curvature perturbation if the initial ?eld perturbations are Gaussian. The calculation requires only the knowledge of some family of unperturbed universes. A formula is given for the normalization...
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| Formato: | Artículo (Article) |
| Lenguaje: | Desconocido (Unknown) |
| Publicado: |
Physical Review Letters; Vol. 95, No. 12
2005
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| Acceso en línea: | http://babel.banrepcultural.org/cdm/ref/collection/p17054coll23/id/622 |
| Sumario: | We extend the Infinite N formalism so that it gives all of the stochastic properties of the primordial curvature perturbation if the initial ?eld perturbations are Gaussian. The calculation requires only the knowledge of some family of unperturbed universes.
A formula is given for the normalization fNL of the bispectrum of, 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. |
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