Hypermagnetic Baryogenesis

Details Hypermagnetic Baryogenesis Hypermagnetic Baryogenesis

2007-12-10

arxiv.org/abs/0712.1523v3

Phys.Lett.B664:154-156,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, no figure, accepted in Phys. Lett. B

Scientific paper

10.1016/j.physletb.2008.05.027

We study a new scenario for baryogenesis due to the spontaneous breaking of the $CPT$ invariance through the interaction between a baryon current and a hypermagnetic helicity. The hypermagnetic helicity (Chern-Simons number) of $U(1)_Y$ provides a $CPT$ violation background for the generation of baryons via sphaleron processes, which protects these baryons from the sphaleron wash-out effect in thermal equilibrium. It is shown that if the present amplitude of the resultant magnetic fields are sufficiently large, for a wide range mass scale (from TeV to the Planck scale), the observational magnitude of the baryon asymmetry of the Universe can be realized.

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