Gluonic Pole Matrix Elements in Spectator Models

Details Gluonic Pole Matrix Elements in Spectator Models Gluonic Pole Matrix Elements in Spectator Models

2008-08-18

arxiv.org/abs/0808.2374v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

Talk given by A. Mukherjee at Transversity 2008, Ferrara, Italy

Scientific paper

We investigate the gluonic pole matrix element contributing to the first $p_T$ moment of the distribution and fragmentation functions in a spectator model. By performing a spectral analysis, we find that for a large class of spectator models, the contribution of gluonic pole matrix elements is non-zero for the distribution correlators, whereas in fragmentation correlators they vanish. This outcome is important in the study of universality for fragmentation functions.

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