Chaotic spin precession in anisotropic universes and fermionic dark matter |
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| Authors: | A. Yu. Kamenshchik O. V. Teryaev |
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| Affiliation: | 1.Dipartimento di Fisica e Astronomia,Università di Bologna and INFN,Bologna,Italy;2.Bogoliubov Laboratory of Theoretical Physics,Joint Institute for Nuclear Research,Dubna,Russia |
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| Abstract: | We consider the precession of a Dirac particle spin in some anisotropic Bianchi universes. This effect is present already in the Bianchi-I universe. In the Bianchi-IX universe it acquires the chaotic character due to the stochasticity of the oscillatory approach to the cosmological singularity. The related helicity flip of fermions in the veryearly Universe may produce the sterile particles contributing to dark matter. |
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