The generation of matter-antimatter asymmetries and hypermagnetic fields by the chiral vortical effect of transient fluctuations

• Published in: arXiv.org
• Main Authors: Abbaslu, S, S Rostam Zadeh, Mehraeen, M, Gousheh, S S
• Format: Paper Journal Article
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 22.06.2021
• Subjects: Antimatter; Asymmetry; Helicity; Physics - High Energy Physics - Phenomenology; Temperature dependence; Variation; Vorticity
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.2001.03499

We study the contribution of temperature-dependent chiral vortical effect to the generation and evolution of the hypermagnetic fields and the matter-antimatter asymmetries, in the symmetric phase of the early Universe, in the temperature range \(100\mbox{GeV} \le T\le 10\mbox{TeV}\). 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.