DBI vector fluxes as curvatons and statistical anisotropy in the CMB
Dimopoulos, Konstantinos (Lancaster University)

I discuss the vector curvaton mechanism which allows a vector field to contribute to or even generate the observed curvature perturbation in the Universe. The effects of such a contribution can have distinct observational signatures such as correlated statistical anisotropy in the power spectrum and bispectrum (i.e. angular dependence of non-Gaussianity) of the curvature perturbation, soon to be probed by the Planck satellite. After presenting the generic mechanism I will show how it can be implemented in the context of DBI inflation, where the vector fluxes on a D3-brane (stationary or not) can play the role of vector curvatons.