Coupled-channel calculations of direct excitation in p((p)over-bar)+H(2s) collisions

The impact parameter method is applied to the proton and antiproton collision with hydrogen atom in the 2s-state in the incident energy range 1 less than or equal to E less than or equal to 10000 keV Cross sections for the excitation of the 3l-state in both processes are presented and compared to each other to investigate the influence of the sign of the projectile charge on the excitation cross-sections.