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An NLO QCD analysis of the final HERMES data on pion multiplicities ispresented and a new set of pion fragmentation functions is extracted from thebest fit to the data. We have studied the so-called [x,z] and [Q^2,z]presentations of their data, as given by HERMES, which, in principle, shouldsimply be two different ways of presenting the experimental data. We have basedour extraction on an excellent fit to the [Q^2,z] presentation of the data. Wealso draw attention to what appears to be a problem with the [x,z] presentationof the HERMES data.

Determination of the fragmentation functions from an NLO QCD analysis of the HERMES data on pion multiplicities