Asymmetric neutrino emission from magnetized proto-neutron star matter including hyperons in relativistic mean field theory

Abstract

We calculate asymmetric neutrino absorption and scattering cross sections on hot and dense magnetized neutron star matter, including hyperons in fully relativistic mean-field theory. The absorption/scattering cross sections are suppressed/enhanced incoherently in the direction of the magnetic field B = B (z) over cap. The asymmetry is 2-4% at the matter density rho(0) <= rho(B) <= 3 rho(0) and temperature T <= 40 MeV for B = 2 x 10(17) G. This asymmetry is comparable to the effects owing to parity violation or asymmetric magnetic field topology proposed for the origin of pulsar kicks.