2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/184975The production of charged particles has been measured in deep inelastic scattering (DIS) with the ZEUS detector. The evolution of the moments of the scaled momenta distributions in $Q^2$ and $x$ has been investigated in the current fragmentation region of the Breit frame. The results in the current region are compared to $e^+e^-$ data and QCD analytical calculations. The results are consistent with the universality of single-particle spectra in DIS and $e^+e^-$ annihilation at high $Q^2.$ The results at low $Q^2$ disagree with analytical calculations based on the modified leading log approximation (MLLA) and local parton hadron duality (LPHD).3 pages. 1 postscript figure + 1 postscript preprint logo + 1 LaTeX file + 1 style fileHigh Energy Physics - Experimenttext