Quark model analysis of the Sivers function

Courtoy, Aurore; Fratini, F.; Scopetta, Sergio; Vento, V.

doi:10.1103/physrevd.78.034002

Cited by 71 publications

(87 citation statements)

References 74 publications

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“…[27] is retaken here in a constituent quark model (CQM) framework. CQM calculations of parton distributions have been proven to be able to predict the gross features of PDFs [36,37], generalized parton distributions (GPDs) [38] and transverse momentum dependent parton distributions (TMDs) [39]. Similar expectations motivated the present analysis.…”

supporting

confidence: 53%

“…First of all, the IK is a typical CQM, successful in reproducing the low energy properties of the nucleon, such as the spectrum and the electromagnetic form factors at small momentum transfer [41,43]. In studies of DIS phenomenology, IK based model calculations were able to describe the gross features of PDFs [36,37], generalized parton distributions (GPDs) [38] and transverse momentum dependent parton distributions (TMDs) [39].…”

Section: Constituent Quark Model Description Of Double Parton Dismentioning

confidence: 99%

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Double parton correlations in constituent quark models

2013

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Double parton correlations, having effects on the double parton scattering processes occurring in high-energy hadron-hadron collisions, for example at the LHC, are studied in the valence quark region, by means of constituent quark models. In this framework, two particle correlations are present without any additional prescription, at variance with what happens, for example, in independent particle models, such as the MIT bag model in its simplest version. From the present analysis, conclusions similar to the ones obtained recently in a modified version of the bag model can be drawn: correlations in the longitudinal momenta of the active quarks are found to be sizable, while those in transverse momentum are much smaller. However, the used framework allows to understand clearly the dynamical origin of the correlations. In particular, it is shown that the small size of the correlations in transverse momentum is a model dependent result, which would not occur if models with sizable quark orbital angular momentum were used to describe the proton. Our analysis permits therefore to clarify the dynamical origin of the double parton correlations and to establish which, among the features of the results, are model independent. The possibility to test experimentally the studied effects is discussed.

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confidence: 53%

Section: Constituent Quark Model Description Of Double Parton Dismentioning

confidence: 99%

Double parton correlations in constituent quark models

2013

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“…1 and 2 the distributions introduced in Eqs. (16,17) are shown for three values of x 2 and for k ⊥ = 0. One can easily realize that the support problem has been solved, i.e., the dPDFs are different from zero only in physical kinematical regions, when x 1 + x 2 ≤ 1.…”

Section: Results Of the Calculations At The Hadronic Scalementioning

confidence: 99%

“…In the second case dPDFs have been calculated in a non relativistic (NR) constituent quark model (CQM) framework, since CQMs, in the valence region, reproduce the gross features of PDF data and give reasonable predictions of generalized parton distribution functions (GPDs) and transverse momentum dependent parton distributions (TMDs) (see, e.g., Refs. [15][16][17]). These expectations motivated the analysis of Refs.…”

Section: Introductionmentioning

confidence: 99%

Double parton correlations in Light-Front constituent quark models

Rinaldi

Scopetta

Traini

et al. 2015

EPJ Web of Conferences

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Abstract. Double parton distribution functions (dPDF) represent a tool to explore the 3D proton structure. They can be measured in high energy proton-proton and proton nucleus collisions and encode information on how partons inside a proton are correlated among each other. dPFDs are studied here in the valence quark region, by means of a constituent quark model, where two particle correlations are present without any additional prescription. This framework allows to understand the dynamical origin of the correlations and to clarify which, among the features of the results, are model independent. Use will be made of a relativistic light-front scheme, able to overcome some drawbacks of the previous calculation. Transverse momentum correlations, due to the exact treatment of the boosts, are predicted and analyzed. The role of spin correlations is also shown. Due to the covariance of the approach, some symmetries of the dPDFs are seen unambigously. For the valence sector, also the study of the QCD evolution of the model results, which can be performed safely thanks to the property of good support, has been also completed.

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“…Form factors (FFs) of specimens of various types, from nuclear compounds to biological tissues, have been widely investigated in the past and also recently in different branches of science, since they provide detailed information concerning the electric charge distribution of the specimens [1][2][3][4][5][6]. By systematically measuring FFs, information about the electric charge distribution of targets has been extensively extracted from scattering experiments [7,8].…”

Section: Introductionmentioning

confidence: 99%

Analytical evaluation of atomic form factors: Application to Rayleigh scattering

Safari

Santos

Amaro

et al. 2015

Journal of Mathematical Physics

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Atomic form factors are widely used for the characterization of targets and specimens, from crystallography to biology. By using recent mathematical results, here we derive an analytical expression for the atomic form factor within the independent particle model constructed from nonrelativistic screened hydrogenic wavefunctions. The range of validity of this analytical expression is checked by comparing the analytically obtained form factors with the ones obtained within the Hartee-Fock method. As an example, we apply our analytical expression for the atomic form factor to evaluate the differential cross section for Rayleigh scattering off neutral atoms.

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Quark model analysis of the Sivers function

Cited by 71 publications

References 74 publications

Double parton correlations in constituent quark models

Double parton correlations in constituent quark models

Double parton correlations in Light-Front constituent quark models

Analytical evaluation of atomic form factors: Application to Rayleigh scattering

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