A quark model analysis of the Sivers function

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dc.creatorCourtoy, A.
dc.creatorFratini, F.
dc.creatorScopetta, S.
dc.creatorVento, V.
dc.date2008-01-28
dc.date2008-07-14
dc.date.accessioned2026-07-07T11:55:38Z
dc.date.available2026-07-07T11:55:38Z
dc.descriptionWe develop a formalism to evaluate the Sivers function. The approach is well suited for calculations which use constituent quark models to describe the structure of the nucleon. A non-relativistic reduction of the scheme is performed and applied to the Isgur-Karl model of hadron structure. The results obtained are consistent with a sizable Sivers effect and the signs for the u and d flavor contributions turn out to be opposite. This pattern is in agreement with the one found analyzing, in the same model, the impact parameter dependent generalized parton distributions. The Burkardt Sum Rule turns out to be fulfilled to a large extent. We estimate the QCD evolution of our results from the momentum scale of the model to the experimental one and obtain reasonable agreement with the available data.
dc.description31 pages, 4 figures. Extended version, discussion of the Burkardt Sum Rule added, references added, minor changes in the numerical results, same interpretation. Final version accepted for publication in Phys. Rev. D
dc.identifierhttps://arxiv.org/abs/0801.4347
dc.identifierhttp://arxiv.org/abs/0801.4347
dc.identifierPhys.Rev.D78:034002,2008
dc.identifierdoi:10.1103/PhysRevD.78.034002
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/205306
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Theory
dc.titleA quark model analysis of the Sivers function
dc.typetext

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