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Nonlinear propagation of neutrinos in a strongly magnetized medium

Shukla, P.K. and Stenflo, L. and Bingham, R. and Bethe, H.A. and Dawson, J.M. and Mendonça, J.T. (1997) Nonlinear propagation of neutrinos in a strongly magnetized medium. Physics Letters A, 230 (5-6). pp. 353-357. ISSN 0375-9601

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The nonlinear propagation of an intense neutrino flux in an electron-positron plasma with equilibrium density and magnetic field inhomogeneities is considered. It is found that the neutrinos are nonlinearly coupled with electrostatic and electromagnetic disturbances due to weak Fermi interaction and ponderomotive forces. The process is governed by a Klein-Gordon equation for the neutrino flux and a wave equation for the plasma oscillations in the presence of the ponderomotive force of the neutrinos. This pair of equations is then used to derive a nonlinear dispersion relation which exhibits that nonthermal electrostatic and electromagnetic fluctuations are created on account of the energy density of the neutrinos. The relevance of our investigation to the anomalous absorption of neutrinos in a nonuniform magnetized medium is pointed out.