Large-Transverse-Momentum Partons and Massiveμ-Pair Production

A field-theoretic parton model is considered, using an exactly renormalizable field theory without a transverse-momentum cutoff. The probability to find a parton with large transverse momentum is controlled by the light-cone behavior of products of field operators. As a result, the cross section to produce massive $\mu$ pairs in hadron collisions is predicted to contain terms that fall off only as ${\left|{\overrightarrow{\mathrm{Q}}}_T\right|}^{-2\mathrm{}}$ and ${\left|{\overrightarrow{\mathrm{Q}}}_T\right|}^{-4\mathrm{}}$.