Light-cone divergence in twist-3 correlation functions

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dc.creatorGamberg, L. P.
dc.creatorHwang, D. S.
dc.creatorMetz, A.
dc.creatorSchlegel, M.
dc.date2006-04-03
dc.date2006-07-12
dc.date.accessioned2026-07-07T10:44:58Z
dc.date.available2026-07-07T10:44:58Z
dc.descriptionIt is argued that the definition of the twist-3 transverse momentum dependent correlation functions must be modified if they contain light-like Wilson lines. In the framework of a simple spectator model of the nucleon we show explicitly the presence of a light-cone divergence for a specific twist-3 time-reversal odd parton density. This divergence emerges for all eight twist-3 T-odd correlators and appears also in the case of a quark target in perturbative QCD. The divergence can be removed by using non-light-like Wilson lines. Based on our results we argue that currently there exists no established factorization formula for transverse momentum dependent twist-3 observables in semi-inclusive DIS and related processes.
dc.description6 pages, 1 figure, slightly extended version, to appear in Phys. Lett. B
dc.identifierhttps://arxiv.org/abs/hep-ph/0604022
dc.identifierhttp://arxiv.org/abs/hep-ph/0604022
dc.identifierPhys.Lett.B639:508-512,2006
dc.identifierdoi:10.1016/j.physletb.2006.07.005
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/182778
dc.subjectHigh Energy Physics - Phenomenology
dc.titleLight-cone divergence in twist-3 correlation functions
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