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Electron neutrino opacity in magnetised media
Author(s) -
Esteban Roulet
Publication year - 1998
Publication title -
journal of high energy physics
Language(s) - English
Resource type - Journals
eISSN - 1126-6708
pISSN - 1029-8479
DOI - 10.1088/1126-6708/1998/01/013
Subject(s) - opacity , physics , neutron star , neutrino , pulsar , electron , astrophysics , supernova , electron scattering , magnetic field , scattering , degenerate energy levels , nuclear physics , electron neutrino , particle physics , neutrino oscillation , optics , quantum mechanics
We study the effects of strong magnetic fields ($B> 10^{13}$~G) in the crosssection for $\nu_e n\to p e$ scattering in the presence of a degenerateelectron background. This can be relevant for the $\nu_e$ propagation in theproto-neutron star stage after supernovae collapse. We find that for fieldstrengths $B> 10^{16}$~G$(E_\nu/10$ MeV$)^2$ the $\nu_e$ opacity is sizeablyaffected by the magnetic field and can lead to a shift in the location of theelectron neutrino sphere towards lower densities. We discuss the implications that this may have for scenarios proposed toexplain the observed pulsar velocities

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