Exchange currents

Riska, D.O.

doi:10.1016/0370-1573(89)90129-4

Cited by 162 publications

(132 citation statements)

References 179 publications

Supporting

Mentioning

128

Contrasting

Order By: Relevance

“…As it is widely accepted, besides the description of NN scattering and the deuteron, one of the great successes and confirmations of Meson theory has been the prediction of Meson Exchange Currents (MEC's) for electroweak processes (see [42,43] for reviews and references therein). In the case of gauge invariance, the inclusion of a form-factor introduced by hand, i.e., not computed consistently within meson theory, implies a kind of non-locality in the interaction.…”

Section: Introductionmentioning

confidence: 99%

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

Cordón

Arriola

2010

Phys. Rev. C

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 99%

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

Cordón

Arriola

2010

Phys. Rev. C

View full text Add to dashboard Cite

show abstract

“…The effect of meson exchange currents on the different electromagnetic properties of nuclei is thoroughly discussed in e.g. [15,16,17,18]. A wide variety of model calculations has been carried out for the enhancement constant κ as well as for the different contributions to κ,, which are theoretically or experimentally accessible [19,20,21], see also [11].…”

Section: Introductionmentioning

confidence: 99%

Meson-induced correlations of nucleons in nuclear Compton scattering

Hütt

Milstein

1998

Phys. Rev. C

View full text Add to dashboard Cite

The non-resonant (seagull) contribution to the nuclear Compton amplitude at low energies is strongly influenced by nucleon correlations arising from meson exchange. We study this problem in a modified Fermi gas model, where nuclear correlation functions are obtained with the help of perturbation theory. The dependence of the mesonic seagull amplitude on the nuclear radius is investigated and the influence of a realistic nuclear density on this amplitude is dicussed. We found that different form factors appear for the static part (proportional to the enhancement constant κ) of the mesonic seagull amplitude and for the parts, which contain the contribution from electromagnetic polarizabilities.

show abstract

“…We add to this the perturbative ρπγ, ωπγ, ρηγ, ωηγ and N∆γ(π, ρ) exchange currents currents shown in Fig 1(d-e), all of which are easily calculated in the usual way [20][21][22][23] with,…”

mentioning

confidence: 99%

Sensitivity of pp-bremsstrahlung to meson-exchange currents

Eden

Gari

1995

Physics Letters B

View full text Add to dashboard Cite

We present pp-bremsstrahlung cross section calculations at the π-production threshold to search for kinematics that best differentiate model-dependent descriptions of the NN t-matrix and accentuate the contributions of isoscalar meson-exchange currents. Existing optimization procedures are shown to be completely unreliable due to the neglect of meson-exchange currents and phase space variations. We show that phase-space hides the most important differences in model t-matrices, but that improved data will be critical to further investigations of exchange currents.

show abstract

Exchange currents

Cited by 162 publications

References 179 publications

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

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

Meson-induced correlations of nucleons in nuclear Compton scattering

Sensitivity of pp-bremsstrahlung to meson-exchange currents

Contact Info

Product

Resources

About