Double distributions for the proton

Tiburzi, Brian C.; Detmold, Will; Miller, Gerald A.

doi:10.1103/physrevd.70.093008

Cited by 38 publications

(58 citation statements)

References 58 publications

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“…Another study of the di-quark model with connection to the generalized parton distribution is discussed in Ref. [82]. It describes the proton in the double distribution formalism, as a bound state state of a residual quark and two quarks strongly coupled in the scalar and axial-vector diquark channel.…”

Section: More Theoretical Modelsmentioning

confidence: 99%

Proton elastic form factor ratios toQ2=3.5GeV2by polarization transfer

Punjabi¹,

Perdrisat²,

Aniol³

et al. 2005

Phys. Rev. C

353

125

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The ratio of the proton elastic electromagnetic form factors, GEp/GMp, was obtained by measuring Pt and P ℓ , the transverse and longitudinal recoil proton polarization components, respectively, for the elastic ep → e p reaction in the four-momentum transfer squared range of 0.5 to 3.5 GeV 2 . In the single-photon exchange approximation, the ratio GEp/GMp is directly proportional to the ratio Pt/P ℓ . The simultaneous measurement of Pt and P ℓ in a polarimeter reduces systematic uncertainties. The results for the ratio GEp/GMp show a systematic decrease with increasing Q 2 , indicating for the first time a definite difference in the distribution of charge and magnetization in the proton. The data have been re-analyzed and systematic uncertainties have become significantly smaller than previously published results.

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Section: More Theoretical Modelsmentioning

confidence: 99%

Proton elastic form factor ratios toQ2=3.5GeV2by polarization transfer

Punjabi¹,

Perdrisat²,

Aniol³

et al. 2005

Phys. Rev. C

353

125

View full text Add to dashboard Cite

show abstract

“…Various parameterizations [26,27,28,29] appear in the literature. The common theme is that deep inelastic scattering structure function νW 2 and the elastic form factors follow the Drell-Yan [30] & West [31] relation: The solid curves are obtained using [20] and the dashed curves with [21].…”

Section: Explanation Of the Neutron's Negative Central Charge Densitymentioning

confidence: 99%

Overview of nucleon structure

Miller¹,

Credé²,

Eugenio³

et al. 2010

AIP Conference Proceedings

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Abstract. The quark-gluon properties of the nucleon are probed by a host of recent and planned experiments. These involve elastic, deep-inelastic, semi-inclusive deep-inelastic (SIDIS), and deeply-virtual Compton scattering. A light-front description is naturally applied to interpret all of these processes. The advantages of this approach will be discussed The talk will then focus on the transverse charge and magnetization densities of the nucleons and the use of SIDIS to reveal the non-spherical shape of the nucleon. We find that the central charge density of the neutron is negative, that the magnetization density of the proton extends further in space than the charge distribution, and that the shape of the nucleon, as measured by the spindependent density, is not spherical.

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“…Although both polynomiality and positivity are basic properties that must hold in any reasonable model of GPDs, usually the model building community meets a dilemma: one can use the double distribution representation (9) but it does not guarantee that the infinite set of inequalities (8) will be satisfied [29,30,31]. Alternatively one can build the models based on the representation (10) or on the so called overlap representation [15], which also automatically obeys the positivity bounds, but then one meets problems with the polynomiality.…”

Section: Polynomiality and Positivitymentioning

confidence: 99%