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A novel method to extract the QCD coupling alpha_s from the energy evolutionof the moments of the parton-to-hadron fragmentation functions at lowfractional hadron momentum z, is presented. The evolution of the moments(multiplicity, peak, width, skewness) of the charged-hadron distribution injets is computed at NMLLA+NLO* accuracy and compared to the experimentaldeep-inelastic e-p data. Values of the strong coupling constant at the Z poleare obtained, alpha_s(m_Z) = 0.119 +/- 0.010, in excellent numerical agreementwith the current world average determined using other methods at the same levelof accuracy.

Extraction of alpha_s from the energy evolution of jet fragmentation functions at low z