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

Author(s)
Amaro, Jose Enrique; Maieron, C.; Caballero, J. A.; Donnelly, T William
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Abstract
Two-particle two-hole contributions to electromagnetic response functions are computed in a fully relativistic Fermi gas model. All one-pion exchange diagrams that contribute to the scattering amplitude in perturbation theory are considered, including terms for pionic correlations and meson-exchange currents (MECs). The pionic correlation terms diverge in an infinite system and thus are regularized by modification of the nucleon propagator in the medium to take into account the finite size of the nucleus. The pionic correlation contributions are found to be of the same order of magnitude as the MECs.
Date issued
2010-10
URI
http://hdl.handle.net/1721.1/60672
Department
Massachusetts Institute of Technology. Center for Theoretical Physics; Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physical Review C
Publisher
American Physical Society
Citation
Amaro, J. et al. “Pionic correlations and meson-exchange currents in two-particle emission induced by electron scattering.” Physical Review C 82.4 (2010): n. pag. © 2010 The American Physical Society
Version: Final published version
ISSN
0556-2813
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