Is the baryon asymmetry of the Universe related to galactic magnetic fields?
arXiv:0905.3365 · doi:10.1103/PhysRevD.80.083510
Abstract
A tiny hypermagnetic field generated before the electroweak phase transition (EWPT) associated to the generation of elementary particle masses can polarize the early Universe hot plasma at huge redshifts z > 10^15. The anomalous violation of the right-handed electron current characteristic of the EWPT converts the lepton asymmetry into a baryon asymmetry. Under reasonable approximations, the magnetic field strength inferred by requiring such "leptogenic" origin for the observed baryon asymmetry of the Universe matches the large-scale cosmological magnetic field strengths estimated from current astronomical observations.
latex file, 4 pages, 1 figure
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- Generation of chiral asymmetry via helical magnetic fields
- Chern-Simons anomaly as polarization effect
- Hypermagnetic helicity evolution in early universe: leptogenesis and hypermagnetic diffusion
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- Gravitational Instabilities of the Cosmic Neutrino Background with Non-zero Lepton Number
- Electromagnetic leptogenesis at the TeV scale
- Probing Lepton Asymmetry with 21 cm Fluctuations
- Neutrino Spin Flavor Precession and Leptogenesis