In this thesis, the large $P_T$ phenomena in hadron-hadron collisions is investigated in the version of the broken color symmetry.
The loweast order diagrams for the process of the inclusive hadron production in hadron-hadron collisions are calculated using the gauge invariance which remarkably reduce the complexity of the calculations.
The comparison with the experimental data of the pp→π+X process shows that the predictions from the broken color gauge theory are consistent with the various experimental data of high $P_T$ process.