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- W2058355918 abstract "We investigate the possibility of embedding the vector curvaton paradigm in D-brane models of inflation in type IIB string theory in a simple toy model. The vector curvaton is identified with the U(1) gauge field that lives on the world volume of a D3-brane, which may be stationary or undergoing general motion in the internal space. The dilaton is considered as a spectator field which modulates the evolution of the vector field. In this set-up, the vector curvaton is able to generate measurable statistical anisotropy in the spectrum and bispectrum of the curvature perturbation assuming that the dilaton evolves as e−ϕ∝a2 where a(t) is the scale factor. Our work constitutes a first step towards exploring how such distinctive features may arise from the presence of several light fields that naturally appear in string theory models of cosmology." @default.
- W2058355918 created "2016-06-24" @default.
- W2058355918 creator A5003450521 @default.
- W2058355918 creator A5018557554 @default.
- W2058355918 creator A5049360649 @default.
- W2058355918 date "2013-03-01" @default.
- W2058355918 modified "2023-09-24" @default.
- W2058355918 title "Statistical anisotropy from vector curvaton in D-brane inflation" @default.
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- W2058355918 doi "https://doi.org/10.1016/j.nuclphysb.2012.11.010" @default.
- W2058355918 hasPublicationYear "2013" @default.
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