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arxiv: 0905.3365 · v1 · submitted 2009-05-20 · ✦ hep-ph · astro-ph.CO

Is the baryon asymmetry of the Universe related to galactic magnetic fields?

classification ✦ hep-ph astro-ph.CO
keywords asymmetrybaryonfieldmagneticuniversecurrentewptanomalous
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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.

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