Power corrections to fragmentation functions in flavour-singlet deep-inelastic scattering Original Research Article

We investigate the power-suppressed corrections to fragmentation functions in flavour-singlet deep-inelastic lepton scattering, to complement the previous results for the non-singlet contribution. Our method is a dispersive approach based on an analysis of Feynman graphs containing massive gluons. As in non-singlet deep-inelastic scattering we find that the leading corrections are proportional to 1/Q2.