An asymptotic approximation of the Fokker–Planck model of evolution of superthermal ultrarelativistic particles in the presence of interaction scaling
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The evolution of a superthermal relict plasma component is studied using a nonequilibrium model of the Universe  and a kinetic equation of the Fokker–Planck type . Given is the evidence of two maxima in the distribution of superthermal particles. The first maximum can further evolve into an equilibrium distribution, whereas the second one can result in a high-energy tail of superthermal relict particles.
Keywordsgravitation theory cosmology relativistic kinetics scaling
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