A Model of Universe Anisotropization

Abstract

The presence of a nonconformally invariant term in the photon sector of the Lorentz-violating extension of Standard Model of particle physics, the "Kostelecký term" $\mathcal{L}_K \propto (k_F)_{αβμν} F^{αβ} F^{\m ν}$, enables a superadiabatic amplification of magnetic vacuum fluctuations during de Sitter inflation. For a particular form of the external tensor $k_F$ that parameterizing Lorentz violation, the generated field possesses a planar symmetry at large cosmological scales and can have today an intensity of order of nanogauss for a wide range of values of parameters defining inflation. This peculiar magnetic field could account for the presently-observed galactic magnetic fields and induces a small anisotropization of the universe at cosmological scales. The resulting Bianchi I model could explain the presumedly low-quadrupole power in the Cosmic Microwave Background radiation.

12 pages, 2 figures, 5 tables, minor revisions, references added, accepted for publication in Phys. Rev. D

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Cited by in corpus (65)

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• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
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• Searching for a Cosmological Preferred Axis: Union2 Data Analysis and Comparison with Other Probes
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• Anisotropic Universe Models in f(T) Gravity
• Constraints on a Bianchi type I spacetime extension of the standard $\Lambda$CDM model
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• Anisotropic universe with anisotropic sources
• Cosmic Parallax in Ellipsoidal Universe
• Gauge field back-reaction in Born Infeld cosmologies
• Two Fluid Scenario in Bianchi Type-I Universe
• Direction dependence of the power spectrum and its effect on the Cosmic Microwave Background Radiation
• Anisotropic massive Brans-Dicke gravity extension of the standard $\Lambda$CDM model
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