Modelling quark distribution and fragmentation functions

  title={Modelling quark distribution and fragmentation functions},
  author={R. Jakob and P. J. G. Mulders and Jo{\~a}o Rodrigues},
The representation of quark distribution and fragmentation functions in terms of nonlocal operators is combined with a simple spectator model. This allows us to estimate these functions for the nucleon and the pion ensuring correct crossing and support properties. We give estimates for the unpolarized functions as well as for the polarized ones and for subleading (higher twist) functions. Furthermore we can study several relations that are consequences of Lorentz invariance and of C, P, and T… CONTINUE READING


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