Sergey Shinkevich (Moscow):

Relativistic theory of inverse beta-decay of polarized neutron in strong magnetic field

Abstract:

The relativistic approach to calculation of the cross section of the inverse beta-decay of polarized neutron, ν_e + n → p + e^-, in strong magnetic field is developed. For the proton wave function we use the exact solution of the Dirac equation in the magnetic field that enables us to account exactly for effects of the proton momentum quantization in the magnetic field and also for the proton recoil motion. We examine the cross section for different energies and directions of propagation of the initial neutrino accounting for neutrons polarization. It is shown that in the super-strong magnetic field the totally polarized neutron matter is transparent for neutrinos propagating antiparallel to the direction of polarization.
The developed relativistic approach can be used for calculations of cross sections of the other URCA processes in strong magnetic fields.

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