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Meson-exchange currents and final-state interactions in quasielastic electron scattering at high momentum transfers

Author(s)
Amaro, J. E.; Barbaro, M. B.; Caballero, J. A.; Maieron, C.; Udias, J. M.; Donnelly, T. William; ... Show more Show less
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Abstract
The effects of meson-exchange currents (MEC) are computed for the one-particle one-hole transverse response function for finite nuclei at high momentum transfers q in the region of the quasi-elastic peak. A semirelativistic shell model is used for the one-particle-emission (e,e') reaction. Relativistic effects are included using relativistic kinematics, performing a semirelativistic expansion of the current operators, and using the Dirac-equation-based (DEB) form of the relativistic mean-field potential for the final states. It is found that final-state interactions (FSI) produce an important enhancement of the MEC in the high-energy tail of the response function for q≥1 GeV/c. The combined effect of MEC and FSI goes away when other models of the FSI, not based on the DEB potential, are employed.
Date issued
2010-01
URI
http://hdl.handle.net/1721.1/56260
Department
Massachusetts Institute of Technology. Center for Theoretical Physics
Journal
Physical Review C
Publisher
American Physical Society
Citation
Amaro, J. E. et al. “Meson-exchange currents and final-state interactions in quasielastic electron scattering at high momentum transfers.” Physical Review C 81.1 (2010): 014606. © 2010 The American Physical Society
Version: Final published version
ISSN
0556-2813

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