Year: 2006
Type: article
Abstract: We consider a hybrid model of inflation, in which two fields drive inflation. Our results show that, if the parameters are finely tuned, this model may generate an observable non-Gaussian contribution to the curvature spectrum, within the limits allowed by the recent WMAP year three data. We show that if one field has a mass η ϕ <0 and an initial value ϕ * <0.025 M pl , while the other field has a mass η σ >0 and an initial field value 0.45 M pl <σ≤ M pl , then the non-Gaussianity is observable with , but that f NL becomes much less than the observable limit should we take both masses to have the same sign, or if we loosened the constraints on the initial field values.
Author: Laila Alabidi
Institution: Lancaster University
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2055902244