[en] A nonscaling parton model is proposed to describe the large transverse momentum processes in hadron collisions. The scale noninvariance behavior of the parton momentum distribution is deduced from the recent ep and μp deep inelastic scattering data where gross violation of scaling has been observed. Power-law breaking effects are parametrized and utilized in the large-p/sub T/ calculations. The basic subprocess in which the large angle scattering occurs is taken to be between the partons only. With the normalization as the only adjustable parameter in the theory, excellent fits of the pion and proton inclusive cross sections at large p/sub T/ for various energies were achieved. Also a no parameter fit of the p/sub T/ dependence of the opposite-side correlation at 90⁰ was produced. A dip was predicted at y = 0 in the rapidity distribution at high p/sub T/ in the opposite hemisphere, but no data with p/sub T/ > 2 GeV/c is available to check the prediction. The phenomenological success of the nonscaling model therefore, on the one hand, restores the quark-quark hard-collision subprocess for large-p/sub T/ reactions, while on the other suggests severe deviation from scaling in lepton induced interactions at very high Q²