Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1995-10-11
Nucl.Phys. A598 (1996) 503-514
Physics
Nuclear Physics
Nuclear Theory
13 pages, uses REVTeX and epsfig, 10 postscript figures; a postscript version of the paper is available by anonymous ftp at
Scientific paper
10.1016/0375-9474(96)00010-3
The longitudinal quasielastic parity-violating electron scattering response is explored within the context of a model that builds antisymmetrized RPA-HF correlations on a relativistic Fermi gas basis. The large sensitivity to nuclear dynamics of this observable, found in previous studies where only pionic correlations were included, is shown to survive in the present model where the effects from pion, rho, sigma and omega exchange in a version of the Bonn potential are incorporated. Through an intricate diagrammatic cancellation/filtration mechanism the longitudinal parity-violating response turns out to be close to the one obtained in first-order perturbation theory with the pion alone. Finally, in accord with our previous work, the parity-violating response is seen to display appreciable sensitivity to the electric strangeness content of the nucleon, especially at high momentum transfer.
Barbaro Maria B.
Donnelly T. W.
Molinari Anna
Pace Arturo de
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