scholarly journals Pionic correlations and meson-exchange currents in two-particle emission induced by electron scattering

2010 ◽  
Vol 82 (4) ◽  
Author(s):  
J. E. Amaro ◽  
C. Maieron ◽  
M. B. Barbaro ◽  
J. A. Caballero ◽  
T. W. Donnelly
Keyword(s):  
Electron Scattering ◽  
Particle Emission ◽  
Meson Exchange ◽  
Meson Exchange Currents

Meson exchange currents in deep inelastic electron scattering from nuclei

1978 ◽  
Vol 76 (4) ◽  
pp. 393-396 ◽  
Author(s):  
T.W. Donnelly ◽  
J.W. van Orden ◽  
T. de Forest ◽  
W.C. Hermans
Keyword(s):  
Electron Scattering ◽  
Meson Exchange ◽  
Inelastic Electron ◽  
Inelastic Electron Scattering ◽  
Deep Inelastic Electron ◽  
Meson Exchange Currents

scholarly journals Delta-isobar relativistic meson exchange currents in quasielastic electron scattering

2003 ◽  
Vol 723 (1-2) ◽  
pp. 181-204 ◽  
Author(s):  
J.E. Amaro ◽  
M.B. Barbaro ◽  
J.A. Caballero ◽  
T.W. Donnelly ◽  
A. Molinari
Keyword(s):  
Electron Scattering ◽  
Meson Exchange ◽  
Meson Exchange Currents

scholarly journals Emission of neutron-proton and proton-proton pairs in electron scattering induced by meson-exchange currents

2016 ◽  
Vol 94 (5) ◽  
Author(s):  
I. Ruiz Simo ◽  
J. E. Amaro ◽  
M. B. Barbaro ◽  
A. De Pace ◽  
J. A. Caballero ◽  
...  
Keyword(s):  
Electron Scattering ◽  
Meson Exchange ◽  
Proton Proton ◽  
Meson Exchange Currents

scholarly journals Relativistic effects in electromagnetic meson-exchange currents for one-particle emission reactions

1998 ◽  
Vol 643 (4) ◽  
pp. 349-382 ◽  
Author(s):  
J.E. Amaro ◽  
M.B. Barbaro ◽  
J.A. Caballero ◽  
T.W. Donnelly ◽  
A. Molinari
Keyword(s):  
Relativistic Effects ◽  
Particle Emission ◽  
Meson Exchange ◽  
Meson Exchange Currents

TWO-BODY ELECTRO DISINTEGRATION OF THE TRINUCLEON BOUND STATE

2003 ◽  
Vol 18 (02n06) ◽  
pp. 244-247
Author(s):  
L. P. YUAN ◽  
K. CHMIELEWSKI ◽  
A. DELTUVA ◽  
M. OELSNER ◽  
P. U. SAUER ◽  
...  
Keyword(s):  
Electron Scattering ◽  
Final State Interaction ◽  
Bound State ◽  
State Interaction ◽  
Meson Exchange ◽  
Inelastic Electron ◽  
Final States ◽  
Final State ◽  
Isobar Excitation ◽  
Meson Exchange Currents

The contribution describes inelastic electron scattering from 3 He with two-body final states. The description allows for single Δ-isobar excitation and includes final-state interaction and meson exchange currents.

Isovector excitation of stretched states in nuclei: effects of meson exchange currents, unbound wave functions, and knockout exchange amplitudes on the extraction of particle–hole strengths

1987 ◽  
Vol 65 (6) ◽  
pp. 666-676 ◽  
Author(s):  
R. A. Lindgren ◽  
M. Leuschner ◽  
B. L. Clausen ◽  
R. J. Peterson ◽  
M. A. Plum ◽  
...  
Keyword(s):  
Electron Scattering ◽  
Transition Amplitude ◽  
Form Factors ◽  
Wave Functions ◽  
Meson Exchange ◽  
Valence Nucleon ◽  
Radial Wave ◽  
Model Calculations ◽  
Nucleus Scattering ◽  
Meson Exchange Currents

It is well known that the strength for excitations of [Formula: see text] high spin, stretched states observed via inelastic scattering, is generally much smaller than that predicted by spherical shell-model calculations. In addition, results obtained from electromagnetic and hadronic studies have discrepancies at the 20% level. For us to gain a better understanding of reduced magnetic strength in electron scattering and hopefully close the gap between experiment and theory, calculations of the electron-scattering form factors have been performed including the effects due to meson exchange currents in the transition amplitude and the effects due to unbound wave functions for the valence nucleon. The effect of the meson exchange-current contributions is to uniformly enhance the form factors near the first maximum, resulting in a 16 to 20% further reduction of the stretched particle–hole strength. The effect due to the radial wave functions deduced from Woods–Saxon potentials in which the nucleon is not bound is to reduce the form factors, thereby resulting in an increase in the spectroscopic strength. As regards the comparison of results obtained with electromagnetic and hadronic probes, the implied sensitivity to higher order current and spin–current transition densities associated with the nonlocality due to the tensor knockout exchange amplitudes in nucleon–nucleus scattering is considered explicitly. It is found that the simplest correspondence between electron and nucleon–nucleus scattering is preserved for isovector excitations but not for isoscalar excitations under the usual assumptions for the tensor interaction. It is clear that precise comparisons between experiment and theory (or between probes) cannot be made unless these and related effects are consistently included.

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