2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/180398Within the LO QCD parton model of SIDIS with unintegrated quark distribution and fragmentation functions we study the transverse momentum and azimuthal dependencies of the double spin asymmetries $A_{LT}$ and $A_{LL}$. For later we include ${\cal O}(k_{\perp}/Q)$ kinematic corrections, which induce an azimuthal modulation of the asymmetry, analogous to the Cahn effect in unpolarized SIDIS. We show that a study of these asymmetries allows to extract the transverse momentum dependence of the unintegrated helicity distribution function $g_{1L}^q(x,k_\perp)$ and $g_{1T}^q(x,k_\perp)$. This report is based on research published in [1] and [2], where predictions are given for ongoing COMPASS, HERMES and JLab experiments.4 pages, 2 figures. Talk presented at the 17th International Spin Physics Symposium, SPIN2006, Kyoto, Japan, October 2-7, 2006High Energy Physics - PhenomenologyHigh Energy Physics - Experimenttext