Gluonic pole matrix elements and universality

Leonard Gamberg, Asmita Mukherjee, Piet Mulders

Research output: Contribution to journalConference articlepeer-review


We investigate the spectral properties of quark-quark-gluon correlators and use this to study gluonic pole matrix elements. Such matrix elements appear in principle both for distribution functions such as the Sivers function and fragmentation functions such as the Collins function. We find that for a large class of spectator models, the contribution of the gluonic pole matrix element for fragmentation functions vanishes. This result is important in the study of universality for fragmentation functions.

Original languageEnglish (US)
Pages (from-to)346-351
Number of pages6
JournalAIP Conference Proceedings
StatePublished - 2009
EventInternational Workshop on Diffraction in High Energy Physics, DIFFRACTION 2008 - La Londe-les-Maures, France
Duration: Sep 9 2008Sep 14 2008

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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