Deep inelastic J/ψ production at HERA in the kT-factorization approach and its consequences on the nonrelativistic QCD

In the framework of the k_T-factorization approach, we analyse the inclusive and inelastic production of J/ψ particles in deep inelastic ep scattering. We take into account both colour-singlet and colour-octet production channels. We inspect the sensitivity of theoretical predictions to the choice of model parameters. Our theoretical results agree reasonably well with recent experimental data collected by the H1 collaboration at HERA.