The ϱNN vertex in vector-dominance models

Höhler, G.; Pietarinen, E.

doi:10.1016/0550-3213(75)90042-5

Cited by 360 publications

(155 citation statements)

References 36 publications

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“…The vector g ρN N coupling constant is after Sakurai's universality g ρN N = g ρππ /2 while the current-algebra KSFR relation provides g ρππ = m ρ /( √ 2f π ), yielding g ρN N = 2.9. The ρN N Vertex in Vector Dominance Models was also determined in the old analysis [84] yielding yields g ρ = 2.9(1) a value confirmed in Ref. [85].…”

Section: Appendix A: Overview Of Coupling Constantsmentioning

confidence: 52%

Renormalization versus strong form factors for one-boson-exchange potentials

Cordón

Arriola

2010

Phys. Rev. C

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We analyze the One Boson Exchange Potential from the point of view of Renormalization theory. We show that the nucleon-meson Lagrangean while predicting the NN force does not predict the NN scattering matrix nor the deuteron properties unambiguously due to the appearance of short distance singularities. While the problem has traditionally been circumvented by introducing vertex functions via phenomenological strong form factors, we propose to impose physical renormalization conditions on the scattering amplitude at low energies. Working in the large Nc approximation with π,σ,ρ and ω mesons we show that, once these conditions are applied, results for low energy phases of proton-neutron scattering as well as deuteron properties become largely insensitive to the form factors and to the vector mesons yielding reasonable agreement with the data and for realistic values of the coupling constants.

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Section: Appendix A: Overview Of Coupling Constantsmentioning

confidence: 52%

Renormalization versus strong form factors for one-boson-exchange potentials

Cordón

Arriola

2010

Phys. Rev. C

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“…The first approach we use to estimate the size of a k is the vector dominance ansatz, where the form factors are assumed to be dominated by vector meson exchange: ω for I = 0, and ρ for I = 1 [92]. In particular, the imaginary part of the form factor is given by [93] ImG…”

Section: Vector Dominance Ansatzmentioning

confidence: 99%

Model independent extraction of the proton magnetic radius from electron scattering

2014

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We combine constraints from analyticity with experimental electron-proton scattering data to determine the proton magnetic radius without model-dependent assumptions on the shape of the form factor. We also study the impact of including electron-neutron scattering data, and ππ → NN data. Using representative datasets we find for a cut of Q 2 ≤ 0.5 GeV 2 , r p M = 0.91 +0.03 −0.06 ± 0.02 fm using just proton scattering data; r p M = 0.87 +0.04 −0.05 ± 0.01 fm adding neutron data; and r p M = 0.87 +0.02 −0.02 fm adding ππ data. We also extract the neutron magnetic radius from these data sets obtaining r n M = 0.89 +0.03 −0.03 fm from the combined proton, neutron, and ππ data.

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“…For the isoscalar spectral function, the integral starts at t 0 = 9m 2 π , corresponding to 3π intermediate states. The two-pion continuum contribution was estimated by Höhler and collaborators [Hoh76] by using pion time-like FF data and ππ → NN amplitudes which were determined by extrapolating πN partial waves to the time-like region [Hoh75].…”

Section: Dispersion Analysesmentioning

confidence: 99%

Nucleon electromagnetic form factors

Perdrisat

Punjabi

Vanderhaeghen

2007

Progress in Particle and Nuclear Physics

475

583

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There has been much activity in the measurement of the elastic electromagnetic proton and neutron form factors in the last decade, and the quality of the data has been greatly improved by performing double polarization experiments, in comparison with previous unpolarized data. Here we review the experimental data base in view of the new results for the proton, and neutron, obtained at MIT-Bates, MAMI, and JLab. The rapid evolution of phenomenological models triggered by these high-precision experiments will be discussed, including the recent progress in the determination of the valence quark generalized parton distributions of the nucleon, as well as the steady rate of improvements made in the lattice QCD calculations.

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The ϱNN vertex in vector-dominance models

Cited by 360 publications

References 36 publications

Renormalization versus strong form factors for one-boson-exchange potentials

Renormalization versus strong form factors for one-boson-exchange potentials

Model independent extraction of the proton magnetic radius from electron scattering

Nucleon electromagnetic form factors

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