Magnetic helicity in plasma of chiral fermions electroweakly interacting with inhomogeneous matter

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DOI Доступ к ресурсу на сайте издателя			10.1016/j.nuclphysb.2020.115049

Title: Magnetic helicity in plasma of chiral fermions electroweakly interacting with inhomogeneous matter
Creator: Dvornikov, Maxim S.
Date: 2020
DOI: 10.1016/j.nuclphysb.2020.115049
Description: We study chiral fermions electroweakly interacting with a background matter having the nonuniform density and the velocity arbitrarily depending on coordinates. The dynamics of this system is described approximately by finding the Berry phase. The effective action and the kinetic equations for right and left particles are derived. In the case of a rotating matter, we obtain the correction to the anomalous electric current and to the Adler anomaly. Then we study some astrophysical applications. Assuming that the chiral imbalance in a rotating neutron star vanishes, we obtain the rate of the magnetic helicity change owing to the interaction of chiral electrons with background neutrons. The characteristic time of the helicity change turns out to coincide with the period of the magnetic cycle of some pulsars.

Created: 18-03-2021

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Физический факультет Magnetic helicity in plasma of chiral fermions electroweakly interacting with inhomogeneous matter