Hypermagnetic baryogenesis |
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Authors: | Kazuharu Bamba CQ Geng SH Ho |
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Institution: | 1. Department of Physics, Kinki University, Higashi-Osaka 577-8502, Japan;2. Department of Physics, National Tsing Hua University, Hsinchu, Taiwan 300, ROC |
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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 UY(1) 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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Keywords: | 98 80 Cq 98 80 Es 11 30 Fs 98 62 En |
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