Elastic electron-deuteron scattering and the electric neutron form factor at four-momentum transfers 5 fm−2 &lt; q2 &lt; 14 fm−2

Galster, Scott M.; Klein, H.; Moritz, J.; Schmidt, K.; Wegener, D.; Bleckwenn, J.

doi:10.1016/0550-3213(71)90068-x

Cited by 633 publications

(314 citation statements)

References 25 publications

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“…As with baryon masses, there are two types of contributions from meson loops to electromagnetic form factors: regularisation-schemedependent terms, which are analytic in the neighbourhood ofm = 0; and nonana- all; the dashed-line marked by " * " is a fit to experimental data [69] and the dashed-line marked by "+" in the lower-left panel is the fit to G n E (Q 2 ) of Ref. [70]; and the horizontal lines in the right panels mark the experimental value of the nucleon's magnetic moment. lytic scheme-independent terms.…”

Section: Chiral Correctionsmentioning

confidence: 99%

On Nucleon Electromagnetic Form Factors

et al. 2005

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Abstract. A Poincaré covariant Faddeev equation, which describes baryons as composites of confined-quarks and -nonpointlike-diquarks, is solved to obtain masses and Faddeev amplitudes for the nucleon and ∆. The amplitudes are a component of a nucleon-photon vertex that automatically fulfills the Ward-Takahashi identity for on-shell nucleons. These elements are sufficient for the calculation of a quark core contribution to the nucleons' electromagnetic form factors. An accurate description of the static properties is not possible with the core alone but the error is uniformly reduced by the incorporation of meson-loop contributions. Such contributions to form factors are noticeable for Q 2 2 GeV 2 but vanish with increasing momentum transfer. Hence, larger Q 2 experiments probe the quark core. The calculated behaviour of] GeV 2 agrees with that inferred from polarisation transfer data. Moreover, Q 2 F 2 (Q 2 )/F 1 (Q 2 ) ≈ constant on this domain. These outcomes result from correlations in the proton's amplitude. January 25, 2018

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Section: Chiral Correctionsmentioning

confidence: 99%

On Nucleon Electromagnetic Form Factors

et al. 2005

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“…There are many different phenomenological parametrizations of the EM form-factors [6,[28][29][30][31][32][33][34][35][36]. Some of these are based on the theoretical models, but mostly in practical applications simple functional parametrizations fitted to the data are applied [37].…”

Section: Jhep09(2010)053mentioning

confidence: 99%

Neural network parameterizations of electromagnetic nucleon form-factors

Graczyk

Płoński

Sulej

2010

J. High Energ. Phys.

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Abstract:The electromagnetic nucleon form-factors data are studied with artificial feed forward neural networks. As a result the unbiased model-independent form-factor parametrizations are evaluated together with uncertainties. The Bayesian approach for the neural networks is adapted for χ 2 error-like function and applied to the data analysis. The sequence of the feed forward neural networks with one hidden layer of units is considered. The given neural network represents a particular form-factor parametrization. The so-called evidence (the measure of how much the data favor given statistical model) is computed with the Bayesian framework and it is used to determine the best form factor parametrization.

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“…An early functional form for the neutron electric form factor from a Rosenbluth measurement arose from a measurement at DESY in 1971 [6]. As a result of this experiment and many others [5], as well as the Feshbach-Lomon wave function [22], a fit was performed.…”

Section: Fig 23mentioning

confidence: 99%

“…These contributions can be separated from each other through the use of dilution factors: 6) where D back is the background dilution, D N2 is the nitrogen dilution, D p is a dilution factor to correct for proton events detected as neutrons, and D FSI is the dilution factor accounting for interactions with the scattered neutron and the final state of the 3 He nucleus.…”

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confidence: 99%

A Measurement of the neutron electric form factor at very large momentum transfer using polaried electrions scattering from a polarized helium-3 target

Kelleher

2010

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Knowledge of the electric and magnetic elastic form factors of the nucleon is essential for an understanding of nucleon structure. Of the form factors, the electric form factor of the neutron has been measured over the smallest range in Q 2 and with the lowest precision. Jefferson Lab experiment 02-013 used a novel new polarized 3 He target to nearly double the range of momentum transfer in which the neutron form factor has been studied and to measure it with much higher precision. Polarized electrons were scattered off this target, and both the scattered electron and neutron were detected. G n E was measured to be 0.0242 ± 0.0020(stat) ± 0.0061(sys) and 0.0247 ± 0.0029(stat) ± 0.0031(sys) at Q 2 = 1.7 and 2.5 GeV 2 , respectively.

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Elastic electron-deuteron scattering and the electric neutron form factor at four-momentum transfers 5 fm−2 < q2 < 14 fm−2

Cited by 633 publications

References 25 publications

On Nucleon Electromagnetic Form Factors

On Nucleon Electromagnetic Form Factors

Neural network parameterizations of electromagnetic nucleon form-factors

A Measurement of the neutron electric form factor at very large momentum transfer using polaried electrions scattering from a polarized helium-3 target

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