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The construction of gauge-links in arbitrary hard processes

  • C.J. BomhofEmail author
  • P.J. Mulders
  • F. Pijlman
Theoretical Physics

Abstract

Transverse momentum dependent parton distribution and fragmentation functions are described by hadronic matrix elements of bilocal products of field operators off the light-cone. These bilocal products contain gauge-links, as required by gauge-invariance. The gauge-links are path-ordered exponentials connecting the field operators along a certain integration path. This integration path is process-dependent, depending specifically on the short-distance partonic subprocess. In this paper we present the technical details needed in the calculation of the gauge-links, and a calculational scheme is provided to obtain the gauge invariant distribution and fragmentation correlators corresponding to a given partonic subprocess.

Keywords

Wilson Line Hard Part Partonic Subprocess Fragmentation Correlator Collinear Gluon 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  1. 1.Department of Physics and AstronomyVrije Universiteit AmsterdamAmsterdamThe Netherlands

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