Meson-exchange currents and final-state interactions in quasielastic electron scattering at high momentum transfers
|Author||Amaro, J. E.
Barbaro, M. B.
Caballero Carretero, Juan Antonio
Donnelly, T. W.
Udías, J. M.
|Department||Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear|
|Published in||Physical Review C - Nuclear Physics, 81 (1), 014606-1-014606-4.|
|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.|
|Cite||Amaro, J.E., Barbaro, M.B., Caballero Carretero, J.A., Donnelly, T.W., Maieron, C. y Udías, J.M. (2010). Meson-exchange currents and final-state interactions in quasielastic electron scattering at high momentum transfers. Physical Review C - Nuclear Physics, 81 (1), 014606-1-014606-4.|