The scattering and absorption processes of weakly relativistic electric and scalar particles in Kerr-Newman fields with an event-horizon radius less than the particle wavelength are considered. Particle absorption by the event horizon is due to polarizational phenomena $\sim r_g/\lambda$ in electron scattering. Corrections of the same order to the differential scattering cross section are obtained, together with expressions for the total absorption cross sections. The general formulas are used to consider analogous processes involving the neutrino.
Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia
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