Effects of meson-exchange currents on the (e→,e’p) structure functions

Autor:	Jan Ryckebusch, Michel Waroquier, Veerle Van der Sluys
Rok vydání:	1994
Předmět:	Nuclear reaction Physics Nuclear and High Energy Physics Meson Computer Science::Information Retrieval Nuclear Theory Hadron Hartree–Fock method Elementary particle Quantum mechanics Atomic physics Nuclear Experiment Nucleon Random phase approximation Boson
Zdroj:	Physical Review C. 49:2695-2703
ISSN:	1089-490X 0556-2813
DOI:	10.1103/physrevc.49.2695
Popis:	The response functions for the unpolarized ([ital e],[ital e][prime][ital p]) and polarized ([ital [rvec e]],[ital e][prime][ital p]) reaction are calculated for medium-heavy nuclei under quasifree conditions. The formalism presented here incorporates both electron distortion effects and two-body currents related to meson-exchange and the [Delta](1232) excitation. The final-state interaction of the outgoing nucleon with the residual nucleus is handled in a self-consistent Hartree-Fock random phase approximation formalism. The effect of Coulomb distortion of the incoming and outgoing electron is included within a fully distorted wave calculation. The sensitivity of the results to the two-body currents is discussed for the five structure functions in quasielastic ([ital [rvec e]],[ital e][prime][ital p]) scattering off the target nuclei [sup 16]O and [sup 40]Ca. A selective sensitivity to the two-body currents is obtained in the longitudinal-transverse interference term [ital W][sub [ital L][ital T]] for which two-body currents can explain part of the discrepancy between the impulse-approximation calculations and the data.
Databáze:	OpenAIRE
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