Density Perturbations in the Universe from Massive Vector Fields

Details Density Perturbations in the Universe from Massive Vector Fields Density Perturbations in the Universe from Massive Vector Fields

2007-09-07

arxiv.org/abs/0709.1109v1

AIPConf.Proc.957:387-390,2007

Physics

High Energy Physics

High Energy Physics - Theory

In proceedings of 13th International Symposium on Particles Strings and Cosmology, PASCOS-07, 4pp

Scientific paper

10.1063/1.2823808

I discuss the possibility of using a massive vector field to generate the density perturbation in the Universe. I find that a scale-invariant superhorizon spectrum of vector field perturbations is possible to generate during inflation. The associated curvature perturbation is imprinted onto the Universe following the curvaton scenario. The mechanism does not generate a long-range anisotropy because an oscillating massive vector field behaves as a pressureless isotropic fluid.

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