2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/53862The scattering process of two particles at Planck energies or beyond is calculated using the gravitational shock wave metric for a massive black hole. Then, the scattering between a heavy mass particle and a small mass one is deal with. The cross section contains an extra new term of $σ\propto G^3$ as the correction term of the leading term derived by 't Hooft. The ultrarelativistic limit of the Lorentz boosted Reissner--Norstrom black hole is also calculated.10 Pages, KOBE--FHD--93--05, LaTeXHigh Energy Physics - Theorytext