Rapidity divergences and valid definitions of parton densities

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dc.creatorCollins, John
dc.date2008-08-19
dc.date2008-09-04
dc.date.accessioned2026-07-07T12:43:13Z
dc.date.available2026-07-07T12:43:13Z
dc.descriptionRapidity divergences occur when parton densities in a gauge theory are defined in the most natural way, as expectation values of partonic number operators in light-front quantization. I review these and other related divergences, and show how the definitions of parton densities can be modified to remove the divergences. A modified definition is not only essential for many phenomenological applications of QCD, but also concerns the treatment of parton densities in non-perturbative approaches. The necessity of modifications in the definition of a parton density also entails corrections in the formulation of light-front quantization for gauge theories.
dc.description9 pages. To appear in Proceedings of LIGHT CONE 2008
dc.identifierhttps://arxiv.org/abs/0808.2665
dc.identifierhttp://arxiv.org/abs/0808.2665
dc.identifierPoS LC2008:028,2008
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/220345
dc.subjectHigh Energy Physics - Phenomenology
dc.titleRapidity divergences and valid definitions of parton densities
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