Generating zeta with non-Abelian Vector Fields

Details Generating zeta with non-Abelian Vector Fields Generating zeta with non-Abelian Vector Fields

2012-02-14

arxiv.org/abs/1202.3133v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

4 pages. Contribution to the ERE2011 Spanish Relativity Meeting, Madrid 2011

Scientific paper

In this paper the generation of the primordial curvature perturbation by vector fields of general non-Abelian groups is discussed. We show that non-Gaussianity of the perturbation is dominated by contributions from superhorizon evolution of fields. Also we find that non-Abelian vector fields of reasonably large groups can generate the total of the curvature perturbation without violating observational constraints on the angular modulation of the spectrum.

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