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.
Chaotic spin precession in anisotropic universes and fermionic dark matter / Kamenchtchik Alexandr; Teryaev Oleg. - In: PHYSICS OF PARTICLES AND NUCLEI LETTERS. - ISSN 1547-4771. - STAMPA. - 13:3(2016), pp. 298-302. [10.1134/S1547477116030122]
Chaotic spin precession in anisotropic universes and fermionic dark matter
KAMENCHTCHIK, ALEXANDR;
2016
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
