A Model of Universe Anisotropization
Campanelli, Leonardo
Original · EN
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" Lₖ ∝ (kF)αᵦμν Fαβ F ν, enables a superadiabatic amplification of magnetic vacuum fluctuations during de Sitter inflation. For a particular form of the external tensor kF 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.
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