Partonic Transverse Motion in Unpolarized Semi-Inclusive Deep Inelastic Scattering Processes
Abstract
We analyse the role of partonic transverse motion in unpolarized Semi-Inclusive Deep Inelastic Scattering (SIDIS) processes. Imposing appropriate kinematical conditions, we find some constraints which fix an upper limit to the range of allowed kperp values. We show that, applying these additional requirements on the partonic kinematics, we obtain different results with respect to the usual phenomenological approach based on the Gaussian smearing with analytical integration over an unlimited range of kperp values. These variations are particularly interesting for some observables, like the < cos phih > azimuthal modulation of the unpolarized SIDIS cross section or the average transverse momentum of the final, detected hadron.
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