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arxiv: hep-ph/0209055 · v1 · submitted 2002-09-05 · ✦ hep-ph

Fragmentation functions and their role in determining the polarized parton densities

classification ✦ hep-ph
keywords polarizeddensitiesfragmentationfunctionspartonsemi-inclusiveuncertaintiesasymmetries
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We extract the pion fragmentation functions and their uncertainties from a judicious choice of e+e- and semi-inclusive DIS data. These are used to study the error propagation in the extraction of polarized parton densities from semi-inclusive DIS asymmetries. We conclude that the uncertainties on polarized PDs have been underestimated in the past.

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