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Title: Curvature perturbations in anisotropic inflation with symmetry breaking

We study curvature perturbations in the anisotropic inflationary model with a complex scalar field charged under a U(1) gauge field in Bianchi I universe. Due to Abelian Higgs mechanism, the gauge field receives an additional longitudinal mode. We verify that the dominant contributions into statistical anisotropies come from matter fields perturbations and one can neglect the contributions from the metric perturbations. It is shown that the contribution of longitudinal mode into the statistical anisotropy power spectrum, though exponentially small, has an opposite sign compared to the corresponding contribution from the transverse mode. We obtain an upper bound on gauge coupling in order to satisfy the observational constraints on curvature perturbations anisotropy.
Authors:
 [1] ;  [2]
  1. School of Physics, Institute for Research in Fundamental Sciences (IPM), P.O. Box 19395–5531, Tehran (Iran, Islamic Republic of)
  2. School of Astronomy, Institute for Research in Fundamental Sciences (IPM), P.O. Box 19395–5531, Tehran (Iran, Islamic Republic of)
Publication Date:
OSTI Identifier:
22282614
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2013; Journal Issue: 10; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ANISOTROPY; COMPARATIVE EVALUATIONS; COUPLING; ENERGY SPECTRA; HIGGS BOSONS; HIGGS MODEL; LIMITING VALUES; METRICS; PERTURBATION THEORY; SCALAR FIELDS; SYMMETRY BREAKING; U-1 GROUPS; UNIVERSE