Can the Fermi Motion of Partons Recover Canonical Scaling in Hadronic High-pTProcesses?

Abstract
We study the effects on high-pT spectra of hadrons when partons are allowed to have transverse momentum (Fermi motion). We find the following: (i) The importance of Fermi motion depends crucially on the treatment of "soft" parton-parton collisions. (ii) We disagree with recent claims that values of kT0.6 GeV/c allow canonically scaling quark-quark scattering to describe the data. (iii) We show, furthermore, that even larger values of kT, however implausible, cannot reconcile canonical scaling with the present data.