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

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          Abstract

          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.

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          Author and article information

          Journal
          19 May 2020
          Article
          10.1016/j.nuclphysb.2020.115049
          2005.09358
          93696902-91c5-4b25-8938-bd8013d375c2

          http://arxiv.org/licenses/nonexclusive-distrib/1.0/

          History
          Custom metadata
          14 pages in LaTeX2e, 1 eps figure, to be published in Nucl.Phys.B
          hep-ph astro-ph.HE

          High energy & Particle physics,High energy astrophysical phenomena
          High energy & Particle physics, High energy astrophysical phenomena

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