Asymmetry of neutrino emission from neutron beta decay in superdense matter and a strong magnetic field

The probability of neutron beta decay in the presence of degenerate magnetized matter consisting of electrons, protons, and neutrons is calculated by using exact solutions to the Dirac equation for charged particles in a uniform magnetic field. The asymmetry of the angular distribution of the momentum carried away by product antineutrinos is studied with allowance for the effect of a strong magnetic field. The values of basic parameters (magnetic-field strength, matter density, and matter temperature) that affect the reaction being considered are chosen in such a way as to render this investigation applicable to an analysis of the cooling of a neutron star.