2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/187035If the pomeron is generated by a two gluon exchange there is no a priori reason for a drastic suppression of three gluon exchange with negative parity and charge parity. This would lead to an unacceptably large difference between $p\,p$ and $p\, \bar{p}$ scattering. It is shown that a natural suppression of the $C$=$P$=--1 contribution to high energy scattering is given by a cluster structure of the nucleon.10 pages, epsf.sty and a4wide.sty, 8 eps figs included complete PS-file (with all figs) available at: http://www.thphys.uni-heidelberg.de/~rueter/High Energy Physics - Phenomenologytext