Artículo
Semirelativistic meson-exchange currents in (e,e) and (e,e' p) reactions
Autor/es | Amaro Soriano, José Enrique
Barbaro, M. B. Caballero Carretero, Juan Antonio Kazemi Tabatabaei, F. |
Departamento | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear |
Fecha de publicación | 2003-07-01 |
Fecha de depósito | 2017-07-12 |
Publicado en |
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Resumen | Electron-induced one-nucleon knockout observables are computed for a moderate to high momentum transfer, making use of semirelativistic expressions for the one-body and two-body meson-exchange current matrix
elements. ... Electron-induced one-nucleon knockout observables are computed for a moderate to high momentum transfer, making use of semirelativistic expressions for the one-body and two-body meson-exchange current matrix elements. Emphasis is laid on the semirelativistic form of the D-isobar exchange current and several prescriptions for the dynamical-equivalent form of the D 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 D propagator, is compared the relativistic Fermi gas model. It is found that the best approximation corresponds to the one using the traditional static D propagator. These semirelativistic 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 the meson-exchange currents may modify substantially the TL asymmetry for high missing momentum. |
Agencias financiadoras | Ministerio de Ciencia y Tecnología (MCYT). España Universidad de Sevilla |
Identificador del proyecto | BFM2002-03218
BFM2002-03315 FPA2002-04181-C04-04 SAB2001-0025 |
Cita | Amaro Soriano, J.E., Barbaro, M.B., Caballero Carretero, J.A. y Kazemi Tabatabaei, F. (2003). Semirelativistic meson-exchange currents in (e,e) and (e,e' p) reactions. Physical Review C - Nuclear Physics, 68 (1), 014604-1-014604-12. |
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