Polarized one-quantum annihilation in strong magnetic fields as a process for particle deceleration in neutron star atmospheres

Details Polarized one-quantum annihilation in strong magnetic fields as a process for particle deceleration in neutron star atmospheres Polarized one-quantum annihilation in strong magnetic fields as a process for particle deceleration in neutron star atmospheres

Feb 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apjs...90..905b&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 90, no. 2, p. 905-907

Astronomy and Astrophysics

Astrophysics

Annihilation Reactions, Neutron Stars, Particle Acceleration, Stellar Atmospheres, Stellar Magnetic Fields, Dirac Equation, Electron-Positron Pairs, High Energy Interactions, Landau Factor, Polarized Radiation, Stellar Models

Scientific paper

Since several gamma-ray bursts seem to have their origin in the vicinity of neutron stars, where strong magnetic fields are present (B is approximately equal to 108T), electrons and positrons have to be described, in this instance, by relativistic Landau states. As is well known, strong magnetic fields produce important effects: motion perpendicular to the field is quantized, transverse momentum is not conserved, and polarization effects become important. Moreover, in constrast to the field-free case, exotic processes such as 1 gamma pair-annihilation are not forbidden. With growing magnetic field, the cross section of this process becomes more and more nonnegligible. This cross section strongly depends on the polarization of the electron-positron pairs. Thus the deceleration via annihilation turns out to be a strongly polarization-dependent phenomenon in magnetized electron-positron plasmas.

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