Parity-violating longitudinal response

Abstract

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.

13 pages, uses REVTeX and epsfig, 10 postscript figures; a postscript version of the paper is available by anonymous ftp at ftp://carmen.to.infn.it/pub/barbaro/papers/9510

References in corpus (4)

• Intermediate-Energy Semileptonic Probes of the Hadronic Neutral Current
• The Pion in Electromagnetic and Weak Neutral Current Nuclear Response Functions
• Parity-Violating Electron Scattering from the Pion-Correlated Relativistic Fermi Gas
• The Charge Response of a Meson-Correlated Relativistic Fermi Gas

Cited by in corpus (10)

• Strangeness in the nucleon: neutrino-nucleon and polarized electron-nucleon scattering
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• Electron- versus neutrino-nucleus scattering
• Antisymmetrized random phase approximation for quasielastic scattering in nuclear matter: Non-relativistic potentials
• Linear Response Theory with finite-range interactions
• Nuclear response functions with finite range Gogny force: tensor terms and instabilities
• RPA quasi-elastic responses in infinite and finite nuclear systems
• Quasielastic Electron Scattering from Nuclei: Random-Phase vs. Ring Approximations
• On the role of the effective interaction in quasi-elastic electron scattering calculations
• Skewed recoil polarization in (e,e'p) reactions from polarized nuclei