Partonic Transverse Motion in Unpolarized Semi-Inclusive Deep Inelastic Scattering Processes

Details Partonic Transverse Motion in Unpolarized Semi-Inclusive Deep Inelastic Scattering Processes Partonic Transverse Motion in Unpolarized Semi-Inclusive Deep Inelastic Scattering Processes

2011-06-30

arxiv.org/abs/1106.6177v1

Phys.Rev.D84:034033,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages, 15 figures

Scientific paper

10.1103/PhysRevD.84.034033

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 k_perp 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 k_perp values. These variations are particularly interesting for some observables, like the < cos phi_h > azimuthal modulation of the unpolarized SIDIS cross section or the average transverse momentum of the final, detected hadron.

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