Regular Article - Theoretical Physics
The generation of matter–antimatter asymmetries and hypermagnetic fields by the chiral vortical effect of transient fluctuations
Department of Physics, Shahid Beheshti University, Tehran, Iran
2 School of Particles and Accelerators, Institute for Research in Fundamental Sciences (IPM), P.O.Box 19395-5531, Tehran, Iran
3 Department of Physics, Case Western Reserve University, 10900 Euclid Avenue, 44106, Cleveland, OH, USA
Accepted: 19 May 2021
Published online: 6 June 2021
We study the contribution of the temperature-dependent chiral vortical effect to the generation and evolution of hypermagnetic fields and matter-antimatter asymmetries, in the symmetric phase of the early Universe, in the temperature range 100 GeV 10 TeV. Our most important result is that, due to the chiral vortical effect, small overlapping transient fluctuations in the vorticity field in the plasma and temperature of matter degrees of freedom can lead to the generation of strong hypermagnetic fields and matter-antimatter asymmetries, all starting from zero initial values. We show that, either an increase in the amplitudes of the fluctuations of vorticity or temperature, or a decrease in their widths, leads to the production of stronger hypermagnetic fields, and therefore, larger matter-antimatter asymmetries. We have the interesting result that fluctuating vorticity fields are more productive, by many orders of magnitude, as compared to vorticities that are constant in time.
© The Author(s) 2021
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