Scattering and absorption cross sections of Schwarzschild–anti-de Sitter black hole with quintessence

In this paper, we study the scattering and absorption sections of Schwarzschild--anti de Sitter black hole surrounded by quintessence. The critical values cosmological constant normalization factor are obtained. We describe event horizons extremal condition effects quintessence on classical semi--classical cross--sections have been estimated. Also, section is studied with sinc approximation in eikonal limit. consider state parameter particular cases $\omega=-2/3$ $\omega=-1/2$.