Spectral Analysis of Gluonic Pole Matrix Elements

Details Spectral Analysis of Gluonic Pole Matrix Elements Spectral Analysis of Gluonic Pole Matrix Elements

2008-07-08

arxiv.org/abs/0807.1138v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 2 figures: To appear in the proceedings of 16th International Workshop on Deep-Inelastic Scattering and Related Subje

Scientific paper

We use a spectator framework to 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 the contribution of the gluonic pole matrix element in fragmentation functions vanishes. This outcome is important in the study of universality for fragmentation functions.

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