Hypermagnetic Baryogenesis

Abstract

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.

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

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Cited by in corpus (33)

• Baryogenesis from Decaying Magnetic Helicity
• Large-scale magnetic fields can explain the baryon asymmetry of the Universe
• Hypermagnetic Fields and Baryon Asymmetry from Pseudoscalar Inflation
• Evolution of the Baryon Asymmetry through the Electroweak Crossover in the Presence of a Helical Magnetic Field
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• Faraday rotation, stochastic magnetic fields and CMB maps
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• A lower bound on the right-handed neutrino mass from wash-in leptogenesis
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