Spectral analysis of gluonic pole matrix elements for fragmentation

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dc.creatorGamberg, L. P.
dc.creatorMukherjee, A.
dc.creatorMulders, P. J.
dc.date2008-03-18
dc.date2008-03-26
dc.date.accessioned2026-07-07T11:33:15Z
dc.date.available2026-07-07T11:33:15Z
dc.descriptionThe non-vanishing of gluonic pole matrix elements can explain the appearance of single spin asymmetries in high-energy scattering processes. We use a spectator framework approach 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 for a large class of spectator models, the contribution of the gluonic pole matrix element in fragmentation functions vanishes. This outcome is important in the study of universality for fragmentation functions and confirms findings using a different approach.
dc.description9 pages, 4 figures, added references
dc.identifierhttps://arxiv.org/abs/0803.2632
dc.identifierhttp://arxiv.org/abs/0803.2632
dc.identifierPhys.Rev.D77:114026,2008
dc.identifierdoi:10.1103/PhysRevD.77.114026
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/197825
dc.subjectHigh Energy Physics - Phenomenology
dc.titleSpectral analysis of gluonic pole matrix elements for fragmentation
dc.typetext

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