Semi-relativistic meson exchange currents in (e,e') and (e,e'p) reactions
| dc.creator | Amaro, J. E. | |
| dc.creator | Barbaro, M. B. | |
| dc.creator | Caballero, J. A. | |
| dc.creator | Tabatabaei, F. Kazemi | |
| dc.date | 2003-02-03 | |
| dc.date | 2003-05-20 | |
| dc.date.accessioned | 2026-07-07T10:50:53Z | |
| dc.date.available | 2026-07-07T10:50:53Z | |
| dc.description | Electron-induced one-nucleon knock-out observables are computed for moderate to high momentum transfer making use of semi-relativistic expressions for the one-body and two-body meson-exchange current matrix elements. Emphasis is placed on the semi-relativistic form of the $Δ$-isobar exchange current and several prescriptions for the dynamical-equivalent form of the $Δ$-propagator are analyzed. To this end, the inclusive transverse response function, evaluated within the context of the semi-relativistic approach and using different prescriptions for the $Δ$-propagator, is compared with the fully relativistic calculation performed within the scheme of the relativistic Fermi gas model. It is found that the best approximation corresponds to using the traditional static $Δ$-propagator. These semi-relativistic approaches, which contain important aspects of relativity, are implemented in a distorted wave analysis of quasielastic $(e,e'p)$ reactions. Final state interactions are incorporated through a phenomenological optical potential model and relativistic kinematics is assumed when calculating the energy of the ejected nucleon. The results indicate that meson exchange currents may modify substantially the $TL$ asymmetry for high missing momentum. | |
| dc.description | 24 pages, 9 figures. New version with MEC results including strong form factors. Typo errors in equations corrected. To be published in Phys. Rev. C | |
| dc.identifier | https://arxiv.org/abs/nucl-th/0302004 | |
| dc.identifier | http://arxiv.org/abs/nucl-th/0302004 | |
| dc.identifier | Phys.Rev.C68:014604,2003 | |
| dc.identifier | doi:10.1103/PhysRevC.68.014604 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/184678 | |
| dc.subject | Nuclear Theory | |
| dc.title | Semi-relativistic meson exchange currents in (e,e') and (e,e'p) reactions | |
| dc.type | text |