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The propagation of small amplitude stationary profile nonlinear solitarywaves in a pair plasma is investigated employing the reductive perturbationtechnique via well-known Korteweg de Vries (KdV) and modified KdV (mKdV)equations, we tend to derive the exact form of nonlinear solutions, and studytheir characteristics. Two distinct pair ion species are considered of oppositepolarity and same mass, additionally to a massive charged background species,that is assumed to be stationary, given the frequency scale of interest withinthe pair ion context, the third species is thought of as a background defect(e.g. charged dust) component. On the opposite hand, the model conjointlyapplies formally to electron positron ion (epi) plasmas, if one neglectselectron positron annihilation. A parametric analysis is carried out, asregards the impact of the dusty plasma composition (background number density),species temperature(s) and background species. It is seen that distinguishablesolitary profiles are observed for KdV and mKdV equations. The results are ofconnection in pair ion (fullerene) experiments and additionally potentially inastrophysical environments, e.g. in pulsars.

Propagation of Nonlinear Waves in Multi-Component Pair Plasmas and Electron-Positron-Ion Plasmas