Instabilities in neutrino-plasma density waves

The relativistic kinetic equations (RKE) for lepton plasma in the presence of a strong external magnetic field are derived in Vlasov approximation. The new RKE for the electron spin distribution function includes the weak interaction with neutrinos originated by the axial vector current ($\sim c_A$) and provided by the parity nonconservation. In a polarized electron gas Bloch equation describing the evolution of the magnetization density perturbation is derived from the electron spin RKE being modified in the presence of neutrino fluxes. Such modified hydrodynamical equation allows to obtain the new dispersion equation in a magnetized plasma from which the neutrino driven instability of spin waves can be found. It is shown that this instability is more efficient e.g. in a magnetized supernova than the analogous one for Langmuir waves enhanced in an isotropic plasma.Comment: 20 pages, no figures, added subsection 2.3 about the lepton current conservation, to be published in Astroparticle Physic

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Neutrino (antineutrino) effective charge in a magnetized electron–positron plasma

Serbêto

Rios

Mendonça

et al. 2004

Physics of Plasmas

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Using dynamical techniques of the plasma physics, the neutrino (antineutrino) effective charge in a magnetized dense electron–positron plasma is determined here. It shown that its value, which is determined by the plasma collective processes, depends mainly on the propagation direction of plasma waves and neutrinos against the external magnetic field direction. The direction dependence of the effective charge occurs due to the fact that the magnetic field breaks the plasma isotropy. The present theory gives a unified picture of the problem which is valid for an external magnetic field below the Landau–Schwinger critical value. Comparison with some of the results from the quantum field theory has been made.

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Instabilities in neutrino-plasma density waves

Cited by 5 publications

References 11 publications

Fluid description of collective neutrino–plasma interaction

Fluid description of collective neutrino–plasma interaction

Neutrino kinetics in a magnetized dense plasma

Neutrino (antineutrino) effective charge in a magnetized electron–positron plasma

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