Abstract
Wave-breaking limit of high frequency electrostatic waves in a four-component two-temperature electron-positron (EP) plasma has been studied. Using Sagdeevs pseudopotential approach, the wave-breaking limit in such plasmas has been derived, taking into account the dynamics of both the hot and cool species. It is observed that the value of the limit is diminished in a two temperature EP plasma in comparison to a single-temperature one. The analysis also reveals that the wave-breaking limit is greatly influenced by the ratio of the equilibrium density of the hot species to the equilibrium density of the cool species, and the temperatures of the two species of the plasma. The results of this investigation is expected to have applications in astrophysical and space-plasma environments.
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