STATISTICAL ANISOTROPY, NON-GAUSSIANITY, AND PERTURBATIONS IN VECTOR FIELDS
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Valenzuela-Toledo, C. A., & Rodríguez, Y. (2023). STATISTICAL ANISOTROPY, NON-GAUSSIANITY, AND PERTURBATIONS IN VECTOR FIELDS. Revista De La Academia Colombiana De Ciencias Exactas, Físicas Y Naturales, 35(135), 175–188. https://doi.org/10.18257/raccefyn.35(135).2011.2502

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Abstract

We study the statistical descriptors (the level of statistical anisotropy and levels of nongaussianity) of the primordial curvature perturbation ζ for cosmological models that include scalar and vector fields, the latter proposed to include violations of statistical isotropy. It is found for these models that it is possible to obtain consistency relations among the statistical descriptors, which possess an observational counterpart and that therefore allow us to keeo or rejection a theoretical model. Finally, we show that the obtained results are  agree with the most recent observational data. As a byproduct of this study, we present in this paper the definition of the true cosmological principle.

https://doi.org/10.18257/raccefyn.35(135).2011.2502

Keywords

cosmology | Statistical anisotropy | Non-Gaussianity | Primordial curvature perturbation
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