Relaxation of the chiral chemical potential in the dense matter of a neutron star

Abstract

A model of the generation of a magnetic field in a neutron star is developed, based on an instability of the magnetic field caused by the electroweak interaction between electrons and nucleons in nuclear matter. The rate of change of the helicity of the electrons as they scatter on protons in the dense matter of a neutron star is calculated with the help of methods of quantum field theory. The influence of the electroweak interaction between electrons and background nucleons on the process of change of the helicity is examined. A kinetic equation is derived for the evolution of the chiral chemical potential. The results obtained are used to describe the evolution of the magnetic field in magnetars.

10 pages in pdf, 4 pdf figures, to be published in Russ. Phys. J

References in corpus (4)

• Magnetars: Properties, Origin and Evolution
• Long-range magnetic fields in the ground state of the Standard Model plasma
• Generation of the magnetic helicity in a neutron star driven by the electroweak electron-nucleon interaction
• Spin light of electron in dense matter

Cited by in corpus (4)

• Probing ALP-photon couplings in Neutron Stars: Scalar versus pseudoscalar cases
• Strong magnetic fields in compact stars as a macroscopic parity violation phenomenon
• New magnetic field instability and magnetar bursts
• Reconnection of magnetic fields in neutron stars driven by the electron mass term in the triangle anomaly