561 research outputs found
Light sterile neutrinos effects in processes with electron and muon neutrinos
For oscillation processes involving electron and muon neutrinos, as well as
for beta decay and neutrinoless double beta decay processes, the contributions
of light sterile neutrinos in the characteristics of these processes are
calculated. For this, estimates of the mixing parameters in the model with
three active and three sterile neutrinos are made taking into account some
experimental data. The results obtained can be used for interpretation of
available experimental data, and also for predictions of values of new data,
which will be registered in ongoing and planned experiments.Comment: 11 pages, 3 figure
Landau damping in thin films irradiated by a strong laser field
The rate of linear collisionless damping (Landau damping) in a classical
electron gas confined to a heated ionized thin film is calculated. The general
expression for the imaginary part of the dielectric tensor in terms of the
parameters of the single-particle self-consistent electron potential is
obtained. For the case of a deep rectangular well, it is explicitly calculated
as a function of the electron temperature in the two limiting cases of specular
and diffuse reflection of the electrons from the boundary of the
self-consistent potential. For realistic experimental parameters, the
contribution of Landau damping to the heating of the electron subsystem is
estimated. It is shown that for films with a thickness below about 100 nm and
for moderate laser intensities it may be comparable with or even dominate over
electron-ion collisions and inner ionization.Comment: 15 pages, 2 figure
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